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{{Refimprove|date=January 2010}}
#REDIRECT [[Audi A8]]
{{Infobox automobile
|name = Audi S8 quattro
|image = [[image:Audi S8 -- 09-24-2011.jpg|250px|D3 Audi S8 (US)]]
|manufacturer = [[Audi|AUDI AG]]
|parent_company = [[Volkswagen Group]]
|production = 1994–present
|assembly = [[Neckarsulm]], [[Germany]]
|class = [[full-size car|Large]] [[luxury vehicle|luxury car]], [[sports sedan]]
|body_style = 4-[[vehicle door|door]] [[sedan (automobile)|saloon/sedan]]
|layout = [[longitudinal engine|Longitudinal]] [[front-engine design|front engine]],<br>[[quattro (four wheel drive system)|quattro]] permanent [[four-wheel drive]]
|platform = [[Volkswagen Group D platform]] series
|related = [[Audi A8]]
|sp = uk
}}
The '''Audi S8 quattro''' is a [[sports sedan|high-performance version]] of the [[Germany|German]] [[luxury vehicle|luxury]] [[automotive industry|automaker]] [[Audi]]'s flagship car, the [[full-size car|full-size]] [[Audi A8]]. The S8 is produced at Audi's [[Neckarsulm]] 'aluminium plant', and it was introduced in September 1994. Like the A8, the S8 is only available as a four-[[vehicle door|door]] [[sedan (automobile)|saloon/sedan]], and both generations have been constructed from an all-[[aluminium]] [[monocoque]], dubbed the "Audi Space Frame" (ASF), the S8 using the [[wheelbase#Varying wheelbases within nameplate|standard wheelbase]] platform, and is not available in the long-wheelbase of the A8L.

The S8, like all [[Audi S and RS models|Audi "S" models]], is fitted as standard with Audi's trademark [[quattro (four wheel drive system)|quattro]] [[four-wheel drive]] (4WD), with the S8 using the [[Torsen]]-based permanent 4WD system.

==D2 (''Typ'' 4D, 1994–2003){{anchor|D2|4D}}==
{{Infobox automobile
|name = Audi S8 4.2 quattro (D2)
|image = [[Image:AudiS8 2.jpg|250px]]
|production = September 1994<ref name=ETKA>[[ETKA]]</ref> – {{j|September 2002}}
|predecessor =
|successor =
|platform = [[Volkswagen Group D platform#D2|Volkswagen Group D2]]
|engine = 4.2&nbsp;[[litre|L]] [[V8 engine|V8]] [[DOHC]]
|transmission = 6-speed [[manual transmission|manual]],<br>5-speed [[ZF Friedrichshafen|ZF]] [[ZF 5HP24 transmission|5HP24]] [[tiptronic]] [[automatic transmission|automatic]]
|wheelbase = {{convert|2880|mm|1|abbr=on}}
|length = {{convert|5034|mm|1|abbr=on}}
|width = {{convert|1880|mm|1|abbr=on}}
|height = {{convert|1418|mm|1|abbr=on}}
|weight = {{convert|1845|kg|0|abbr=on}}
|fuel_capacity = {{convert|90|L|1|abbr=on|lk=on}}
|related = [[Audi A8#D2|Audi A8 (D2)]]
|designer =
|sp = uk
}}
In September 1994, according to the official electronic parts catalogue for the Volkswagen Group,<ref name=ETKA/> Audi introduced the '''Audi S8 4.2 quattro''' ('''''Typ'' 4D''') into the [[Europe]]an market with a six-speed [[manual transmission]], and a year later with [[tiptronic]] five-speed [[automatic transmission]] - a high-performance version of the [[Audi A8]] in the vein of [[Mercedes-Benz AMG]] models, sharing the A8's all-[[aluminium]] [[monocoque]] "Audi Space Frame" (ASF), and [[Volkswagen Group D platform#D2|Volkswagen Group D2 platform]].

In the UK, the S8 was only available with an automatic gearbox.

At the same time of the A8's facelift in late 1999, the S8 received the same cosmetic upgrades. This was the first model to be introduced to the [[North America]]n market.

Production of this original S8 ended in September 2002, shortly before the introduction of the current D3-platform A8.

The D2 S8 was also featured in the 1998 film ''[[Ronin (film)|Ronin]]''.

===D2 powertrain===
[[motive power|Motive]] [[power (physics)|power]] in the D2 S8 [[powertrain]] featured an uprated, {{convert|250|kW|PS bhp|0|lk=on}} version of the standard 4 Valves per Cylinder {{convert|4172|cc|1|lk=on}} 90° [[V8 engine|V8]](AKZ) [[petrol engine]] (parts code: 077, identification codes: AKH, AHC). From late 1999, the engine was given a further 8 valves (now 5 valves per cylinder) and compression bump to 11.0:1 from 10.8:1. Power increased to {{convert|265|kW|PS bhp|0}} at 7,000&nbsp;[[revolutions per minute|rpm]], and {{convert|430|Nm|0|lk=on}} of [[torque]] at 3,400&nbsp;rpm (identification codes: AQH, AVP, AYS, BCS). The AHC Code engine was the only 4 valve V8 and featured different exhaust cams, Different Ecu tune, and a higher compression compared to the ABZ(300)bhp engine of the A8.

A sports-recalibrated version of the [[ZF Friedrichshafen|ZF]] [[ZF 5HP24 transmission|5HP24]] five-speed [[tiptronic]] [[automatic transmission]] (parts code: 01L, identification codes: DYM, ECX) ([[gear ratio]]s - 1st: 3.571, 2nd: 2.200, 3rd: 1.505, 4th: 1.000, 5th: 0.804), featuring "Dynamic Shift Programme" (DSP) was standard. European-market models also had a six-speed [[manual transmission]] option (parts code: 01E, identification code: DGV).

[[Torsen]] T-2 based [[quattro (four wheel drive system)|quattro]] permanent [[four-wheel drive]] was also standard. Final drive ratio (for automatic transmission) is 3.730.

===D2 suspension, brakes, wheels & tyres===
A retuned, {{convert|20|mm|1}} lowered sports [[suspension (vehicle)|suspension]] included a 30% stiffer spring rate and 40% more compression damping in the [[shock absorber]]s. Speed-sensitive "[[servotronic]]" power assisted [[steering]] was also standard.

The [[brake]]s featured [[Robert Bosch GmbH|Bosch]] ABS&nbsp;5.3 [[anti-lock braking system|Anti-lock Braking System]], with [[electronic brakeforce distribution|Electronic Brakeforce Distribution]] (EBD), and worked radially ventilated front [[disc brake|discs]] of {{convert|345|mm|2}} in diameter by {{convert|30|mm|2|abbr=on}} thick. The rear vented discs measured {{convert|280|mm|2|abbr=on}} by {{convert|22|mm|2|abbr=on}}. From 2002, an upgraded Bosch ESP&nbsp;5.7 [[electronic stability control|Electronic Stability Programme]] became standard fitment.

Standard [[alloy wheel]]s were 8Jx18" cast [[aluminium alloy]] "Avus" 6-spoke style, with 245/45&nbsp;ZR18 [[Dunlop Tyres|Dunlop]] SP Sport 8000 or [[Bridgestone]] Potenza RE040 performance [[tire|tyres]]. From 1999 [[model year]], an 8.5Jx20" polished "9-spoke RS" wheel became an option, shod with 255/35&nbsp;ZR20 [[Michelin]] Pilot Sport tyres. In 2003, 8Jx18" polished 9-spoke RS wheels became a no-cost option road [[wheel]].

===D2 body and interior===
Whilst the S8 shared the [[aluminium]] [[monocoque]] of the [[Audi A8|A8]], subtle detail included solid aluminium alloy door mirror housings, chrome-effect beltline and lower front [[grille]] trim, and polished twin exhaust pipes, along with subtle "S8" badging. 14-way power adjustable and heated sports front seats with memory function complement heated rear seats.{{-}}

==D3 (''Typ'' 4E, 2006–2010){{anchor|D3|4E}}==
{{Infobox automobile
|name = Audi S8 5.2 FSI quattro (D3)
|image = [[Image:2007-Audi-S8.jpg|250px]]<br>2007 Audi D3 S8 (US)
|production = 2006&ndash;2010
|predecessor =
|successor =
|platform = [[Volkswagen Group D platform#D3|Volkswagen Group D3]]
|engine = 5.2&nbsp;[[litre|L]] [[V10 engine|V10]] [[gasoline direct injection|FSI]] [[DOHC]]
|transmission = 6-speed [[ZF Friedrichshafen|ZF]] [[ZF 6HP26 transmission|6HP26-A61]] [[tiptronic]] [[automatic transmission|automatic]]
|wheelbase = {{convert|2944|mm|1|abbr=on}}
|length = {{convert|5062|mm|1|abbr=on}}
|width = {{convert|1897|mm|1|abbr=on}}
|height = {{convert|1424|mm|1|abbr=on}}
|weight = {{convert|1940|kg|0|abbr=on}}
|fuel_capacity = {{convert|90|L|1|abbr=on|lk=on}}
|related = [[Audi A8#D3|Audi A8 (D3)]]
|designer =
|sp = uk
}}
In the last quarter of 2005, Audi previewed the latest '''S8 5.2 FSI quattro''' ('''''Typ'' 4E'''), based on its [[Volkswagen Group D platform#D3|Volkswagen Group D3 platform]] stablemate, the [[Audi A8]]. Factory production commenced June 2006 and ended after 2009 along with the A8L W12, while the A8 4.2 and A8L 4.2 continued in production for the 2010 model year.

===Performance===
Audi's factory performance claims for the V10 S8 indicate a {{convert|0|to|100|km/h|1}} time of 5.1&nbsp;seconds whilst consuming "SuperPlus" / "EuroSuper" 98&nbsp;[[Research Octane Number|RON]] unleaded [[gasoline|petrol]]. This places the S8 in a competitive range with the [[Maserati Quattroporte]] powered by a 430&nbsp;hp 4.7 V8, the [[Jaguar XJ]]R powered by a 400&nbsp;hp supercharged 4.2 V8, the [[Mercedes-Benz S-Class|Mercedes-Benz S63 AMG]] (naturally aspirated 6.3L V8) and S600 (powered by a twin-turbo 5.5L V12), and the [[BMW 7 Series|BMW 760Li]] (powered by a naturally aspirated 6.0L V12 engine).

The S8 has similar performance to Audi's own top-of-the-line A8L [[W12 engine|W12]], though the W12 is more expensive ($120,000 USD for the W12 versus $96,000 USD for the S8), has more torque, and built on a longer wheelbase (which alone accounts for over 100 pounds of increased weight).<ref name="caranddriver1">{{cite web|url=http://www.caranddriver.com/reviews/car/06q1/2007_audi_s8-first_drive_review |title=2007 Audi S8 - First Drive Review - Auto Reviews |publisher=Car and Driver |date= |accessdate=2011-04-02}}</ref> Compared to the A8L W12, the S8 has sportier mechanical features such as a firmer suspension, larger alloy wheels, and ceramic brakes. The shorter wheelbase and 10-cylinder engine save weight for better handling, but at 5.4 seconds from 0-60&nbsp;mph the S8 trails the W12.<ref>{{cite web|url=http://www.automobilemag.com/roadtests/sedans/0703_sports_sedans_supreme_maserati_quattroporte_audi_s8_mercedes_benz_s63/index.html |title=Sports Sedans Supreme: 2007 Maserati Quattroporte Executive GT vs 2007 Audi S8 vs 2007 Mercedes-Benz S63 - Latest News, Features, and Road Tests - Automobile Magazine |publisher=Automobilemag.com |date=2010-12-13 |accessdate=2011-04-02}}</ref><ref name=CanadianDriver>{{cite web|url=http://www.canadiandriver.com/2009/07/09/inside-story-2009-audi-s8.htm|title=2009 Audi S8|publisher=CanadianDriver Communications Inc.|work=CanadianDriver.com|date=9 July 2009|accessdate=12 November 2009}}</ref><ref>{{cite web|url=http://www.jbcarpages.com/audi/a8/2009/index3.php |title=2009 Audi A8 4.2 V8, A8L, W12, S8 V10 - Used Car Review / Specs / Handling / Performance Parts |publisher=Jbcarpages.com |date=2007-03-03 |accessdate=2011-04-02}}</ref> The S8's top speed is electronically limited to {{convert|250|km/h|1}}.

===D3 powertrain===
[[File:D3 S8.JPG|thumb|left|Audi S8 (D3) 5.2 FSI V10 engine]]

[[motive power|Motive]] [[power (physics)|power]] in the second-generation D3 S8 [[powertrain]] features a 5.2&nbsp;[[litre]] all [[aluminium alloy]] {{convert|5204|cc|1|lk=on}} [[gasoline direct injection|Fuel Stratified Injection]] (FSI) [[multi-valve|40-valve]] (four valves per cylinder) 90° [[V10 engine|V10]] [[petrol engine]] (parts code: 07L, identification code: BSM). [[list of Volkswagen Group petrol engines#BSM|This engine]] is a derivative of the Gallardo's original 5.0&nbsp;litre [[Lamborghini V10]],<ref>{{cite web|url=http://reviews.cnet.com/sedan/2009-audi-s8/4505-10865_7-33512962.html |title=Review on CNet |publisher=Reviews.cnet.com |date=2009-02-06 |accessdate=2010-10-20}}</ref> which was also developed under the Volkswagen Group ownership.

On this Audi-only variant, compared to the Lamborghini engine, it features a longer [[stroke (engine)|stroke]] and wider [[bore (engine)|bore]] - which increases the [[engine displacement|displacement]] of the engine, and produces more [[torque]] at lower revs, making it more suitable for the larger and heavier full-sized luxury Audi saloon. It produces {{convert|331|kW|PS bhp|0|lk=on}} at 7,000&nbsp;rpm, and {{convert|540|Nm|0|lk=on}} of torque at 3,500&nbsp;rpm. The S8's version has its bore whittled out an additional two millimeters, increasing the displacement from 5.0 to 5.2 liters. It also has Audi's direct-injection system, called FSI. Maximum output is down from 493 horsepower at 7800 rpm in the Gallardo to 444 at 7000 rpm in the S8, and torque is up 22 pound-feet (398 pound-feet total), peaking 1000 rpm earlier at 3500 rpm.<ref name="caranddriver1"/>

The engine utilises twin chain-driven [[double overhead camshaft]]s (DOHC), and [[variable valve timing]] for both intake and exhaust valves. Engine management is by way of [[Robert Bosch GmbH|Bosch]] DI-[[Motronic]] MED&nbsp;9.1 electronic [[engine control unit]], which controls the mapped direct ignition, ten individual spark coils, [[common rail]] cylinder-direct sequential multi-point [[fuel injection]], and [[drive by wire]] throttle.

The same 5.2 V10 engine is also used in the third-generation [[Audi S6#C6|Audi S6 (C6)]], but in a slightly lower state of tune where it develops {{convert|320|kW|PS bhp|0}}.

A sports-optimised [[ZF Friedrichshafen|ZF]] [[ZF 6HP26 transmission|6HP26-A61]] six-speed [[tiptronic]] [[automatic transmission]] (parts code: 09E, identification codes: KLW or KZK) ([[gear ratio]]s - 1st: 4.171, 2nd: 2.340, 3rd: 1.521, 4th: 1.143, 5th: 0.867, 6th: 0.691) with "Dynamic Shift Programme" (DSP) and "sport" mode, with [[steering wheel]] mounted paddle-shifters, is the only offering. Output is transmitted via Audi's trademark [[quattro (four wheel drive system)|quattro]] permanent [[four-wheel drive]] system, initially using the [[Torsen]] T-2 50:50 dynamic centre [[differential (mechanical device)|differential]], and from 2008 [[model year]], utilising the latest Torsen T-3 asymmetric dynamic centre differential, with a 'default' torque distribution of 40% to the front [[axle]] and 60% to the rear. Final drive ratio is 4.055, and traction is assisted with Audi's "Electronic Differential Lock" (EDL) and "Anti-Slip Regulation" (ASR) (commonly known as [[traction control system]]) - both functions of the [[Robert Bosch GmbH|Bosch]] ESP&nbsp;5.7 (or the later ESP&nbsp;8.0) [[electronic stability control|Electronic Stability Programme]].

Although the [[Audi R8|Audi R8 5.2 FSI quattro]] (which shares the same 5.2L V10 engine as the S8 and S6) uses the R-tronic® transmission which is sportier and more responsive, the S8 was fitted with a [[tiptronic]] automatic transmission which is smoother (as the S8 is more luxury oriented) and provides better fuel economy.<ref>{{cite web|url=http://www.auto123.com/en/audi/s8/2009/review?carid=1090601501&artid=106274 |title=2009 Audi S8 5.2 quattro Review Editor's Review &#124; Page 1 |publisher=Auto123.com |date=2009-04-10 |accessdate=2011-08-08}}</ref>

===D3 suspension, steering, brakes, tyres===
[[File:Audi S8 V10 black with blue fence.jpg|thumb|Rear 3/4 view of D3 Audi S8 5.2 FSI quattro]]

The S8, like its related A8, utilises a multi-link [[suspension (vehicle)|suspension]] layout front and rear, with pressurised air springs. However, for the S8, the effective spring and damper rates are noticeably firmer, along with re-engineered suspension mounts. "[[servotronic]]" speed-dependent power assisted rack and pinion [[steering]] point the S8 in the desired trajectory.

The [[brake]] system consists of radially ventilated [[disc brake|discs]] all round, the fronts sized at {{convert|385|mm|1}} in diameter by {{convert|36|mm|2|abbr=on}} thick, and the rears at {{convert|335|mm|1|abbr=on}} by {{convert|22|mm|2|abbr=on}}. The discs are clamped with gloss-black painted dual-piston calipers up front, and a single-piston sliding caliper at the rear, coupled to an electro-mechanical parking brake. A [[Robert Bosch GmbH|Bosch]] ESP&nbsp;5.7 (later upgraded to ESP&nbsp;8.0) [[electronic stability control|Electronic Stability Programme]], with [[anti-lock braking system|Anti-lock Braking System]] (ABS), [[Brake Assist]], and [[electronic brakeforce distribution|Electronic Brakeforce Distribution]] (EBD) complete the brake system.

Optional "Audi ceramic" [[reinforced carbon-carbon#Similar products|Carbon fibre-reinforced Silicon Carbide]] (C/SiC) composite front and rear brakes are available, which use {{convert|380|mm|2|abbr=on}} diameter by {{convert|38|mm|3|abbr=on}} thick drilled, radially vented, and floating [[SGL Carbon]] discs, with anthracite grey painted six-piston fixed [[Brembo]] monobloc alloy calipers with the "Audi ceramic" logo up front, and {{convert|356|mm|2|abbr=on}} by {{convert|28|mm|3|abbr=on}} discs at the rear.

Standard [[alloy wheel]]s consist of 9Jx20" [[casting|cast]] aluminium alloy "S design", shod with either {{nowrap|265/35 ZR20 99Y XL}} performance [[tire|tyres]] (either [[Bridgestone]] Potenza RE050A, or [[Yokohama Rubber Company|Yokohama]] Advan Sport), or {{nowrap|275/35 ZR20 102Y XL}} ([[Continental AG|Continental]] SportContact2, [[Dunlop Tyres|Dunlop]] SP SportMaxx, or [[Pirelli]] P-Zero Nero). A direct-acting [[tire pressure monitoring system|tyre pressure monitoring system]] (TPMS) is also standard.

===D3 body and interior===
[[File:S8 D3 cockpit 2009.jpg|thumb|left|[[Dashboard]] of the Audi S8 D3]]

The S8 includes subtle detailing to distinguish it from its related A8. The [[trapezoid]]al "single-frame" [[grille]] bears the characteristic Audi "S model" vertical strut detail which are highlighted in a chrome finish. "S8" badging is displayed front and rear, whilst "V10" badges are displayed on each front wing below the side-repeater indicators. The rear boot-lid incorporates a subtle rear spoiler, and the rear is finished with four chromed oval exhaust tailpipes.

Adaptive [[xenon arc lamp|Xenon]]-plus [[high-intensity discharge lamp|high-intensity discharge]] (HID) headlamps include static turning lights, along with 'swiveling' dynamic cornering lights. [[Daytime running lamp]]s are five [[light-emitting diode]]s (LEDs) incorporated into a [[cloverleaf]] designed reflector, incorporated into the main [[headlamp]] housing.

The interior equipment includes two-colour leather-clad sports seats, a widescreen colour display for the [[Multi Media Interface]] (MMI), and white illuminated needles for the instrument dials.

Other notable options include the "Advanced Parking" system, which includes a rearview camera, whose output is displayed on the colour MMI monitor, with "trajectory" lines which move in conjunction with steering wheel movements.

===D3 gallery===
<gallery>
Image:Audi S8 front 20080303.jpg|Facelifted Audi S8 (2008)
Image:Audi S8 rear 20080303.jpg|Facelifted Audi S8 (2008)
</gallery>{{-}}

==D4 (2011–present){{anchor|D4}}==
{{Infobox automobile
| image =
| name = D4
| transmission = 8-speed automatic
|engine = 4.0L [[V8]]
| production = 2011–present
| class = [[Luxury car]]
| related = [[Audi A8]] D4
| length = {{Convert|5150|mm|in|1|abbr=on}}
| width = {{Convert|1949|mm|in|1|abbr=on}}
| height = {{Convert|1460|mm|in|1|abbr=on}}
| wheelbase = {{Convert|2992|mm|in|1|abbr=on}}
}}

The D4 Audi S8 will go on sale as a 2013 [[model year|model]], after the 2011 Audi A8 and A8L and 2012 Audi A8L W12. Like the previous iteration, the upcoming S8 is expected to cost less than the A8L W12. A direct competitor is the Mercedes-Benz S63 AMG.<ref>[http://www.insideline.com/audi/s8/2013/2013-audi-s8-first-drive.html]</ref>

The S8 can accelerate from 0 to 100&nbsp;km/h in 4.2 s. It is powered by a 4.0&nbsp;[[litre]] [[gasoline direct injection|TFSI]] [[twin-turbo|biturbo]] [[V8 engine]] with {{convert|382|kW|PS bhp|0|lk=on}}. The engine makes 128 hp per liter which is the highest in its class, and it utilizes cylinder deactivation so it can run as a V4 for better fuel economy.<ref>[http://www.insideline.com/audi/s8/2013/2013-audi-s8-first-drive.html]</ref> This compact engine is shared with the [[Bentley Continental GT]], Audi S6, and Audi S7, although the S6 and S7's engines has been detuned to 420 hp.
<ref>[http://www.roadandtrack.com/tests/drives/2012-audi-s8]</ref>

===Development===
Initial reports suggested that the S8 would use the 5.0&nbsp;[[litre]] [[gasoline direct injection|FSI]] [[twin-turbo|biturbo]] [[V10 engine]], which currently powers the [[Audi RS6#C6|Audi RS6 (C6)]] with {{convert|427|kW|PS bhp|0|lk=on}}. This meant that the new S8 could make about 700-730&nbsp;bhp if tuned by MTM or other chip-tuning companies.<ref>{{cite web|url=http://www.caranddriver.com/news/car/08q4/2010_audi_a8_2011_audi_s8-car_news|title=2010 Audi A8 / 2011 Audi S8|publisher=Hachette Filipacchi Media U.S., Inc.|work=CarAndDriver.com|month=December | year=2008|accessdate=12 November 2009}} {{Verify credibility|date=November 2009}}</ref><ref>{{cite web|url=http://www.motorauthority.com/blog/1023222_preview-next-gen-audi-a8-saloon|title=Preview: Next-gen Audi A8 saloon|publisher=High Gear Media|work=MotorAuthority.com|date=20 July 2009|accessdate=12 November 2009}}</ref> More recently, with Audi said to be improving on the fuel economy and emissions from the previous S8's 5.2 FSI V10 and RS6's 5.0 TSFI V10 biturbo, the press expected that the 2012 S8 would have a 4.0-liter twin-turbo V8 making 450hp mated to a 7-speed double-clutch S Tronic transmission.<ref>[http://www.leftlanenews.com/audi-s8.html]</ref>

{{-}}

==See also==
*[[Audi A8]]
*[[Audi S and RS models]]

==References==
{{reflist}}

==External links==
{{Commons category}}
* [http://www.audi.com Audi.com] international portal
* [http://www.audi.co.uk/audi/uk/en2/new_cars/a8_new/s8_limousine.html Audi UK S8]

{{Audi}}
{{Audi (Europe) timeline 1970 to date}}
{{Audi (North America) timeline 1970 to date}}


[[Category:Audi vehicles|S8]]
[[Category:Audi vehicles|S8]]
[[Category:Vehicles introduced in 1996]]
[[Category:Sports cars]]
[[Category:All-wheel-drive vehicles]]
[[Category:Flagship vehicles]]
[[Category:Euro NCAP executive cars]]
[[Category:Full-size vehicles]]
[[Category:Sedans]]
[[Category:Sports sedans]]
[[Category:Vehicles introduced in 1998]]
[[Category:1990s automobiles]]
[[Category:2000s automobiles]]
[[Category:2010s automobiles]]
[[Category:Automobiles powered by 10-cylinder engines]]


[[bg:Ауди S8]]
[[bg:Ауди S8]]

Revision as of 21:44, 7 May 2012

Audi S8 quattro
D3 Audi S8 (US)
Overview
ManufacturerAUDI AG
Production1994–present
AssemblyNeckarsulm, Germany
Body and chassis
ClassLarge luxury car, sports sedan
Body style4-door saloon/sedan
LayoutLongitudinal front engine,
quattro permanent four-wheel drive
PlatformVolkswagen Group D platform series
RelatedAudi A8

The Audi S8 quattro is a high-performance version of the German luxury automaker Audi's flagship car, the full-size Audi A8. The S8 is produced at Audi's Neckarsulm 'aluminium plant', and it was introduced in September 1994. Like the A8, the S8 is only available as a four-door saloon/sedan, and both generations have been constructed from an all-aluminium monocoque, dubbed the "Audi Space Frame" (ASF), the S8 using the standard wheelbase platform, and is not available in the long-wheelbase of the A8L.

The S8, like all Audi "S" models, is fitted as standard with Audi's trademark quattro four-wheel drive (4WD), with the S8 using the Torsen-based permanent 4WD system.

D2 (Typ 4D, 1994–2003)

Audi S8 4.2 quattro (D2)
Overview
ProductionSeptember 1994[1] – Template:J
Body and chassis
PlatformVolkswagen Group D2
RelatedAudi A8 (D2)
Powertrain
Engine4.2 L V8 DOHC
Transmission6-speed manual,
5-speed ZF 5HP24 tiptronic automatic
Dimensions
Wheelbase2,880 mm (113.4 in)
Length5,034 mm (198.2 in)
Width1,880 mm (74.0 in)
Height1,418 mm (55.8 in)
Kerb weight1,845 kg (4,068 lb)

In September 1994, according to the official electronic parts catalogue for the Volkswagen Group,[1] Audi introduced the Audi S8 4.2 quattro (Typ 4D) into the European market with a six-speed manual transmission, and a year later with tiptronic five-speed automatic transmission - a high-performance version of the Audi A8 in the vein of Mercedes-Benz AMG models, sharing the A8's all-aluminium monocoque "Audi Space Frame" (ASF), and Volkswagen Group D2 platform.

In the UK, the S8 was only available with an automatic gearbox.

At the same time of the A8's facelift in late 1999, the S8 received the same cosmetic upgrades. This was the first model to be introduced to the North American market.

Production of this original S8 ended in September 2002, shortly before the introduction of the current D3-platform A8.

The D2 S8 was also featured in the 1998 film Ronin.

D2 powertrain

Motive power in the D2 S8 powertrain featured an uprated, 250 kilowatts (340 PS; 335 bhp) version of the standard 4 Valves per Cylinder 4,172 cubic centimetres (254.6 cu in) 90° V8(AKZ) petrol engine (parts code: 077, identification codes: AKH, AHC). From late 1999, the engine was given a further 8 valves (now 5 valves per cylinder) and compression bump to 11.0:1 from 10.8:1. Power increased to 265 kilowatts (360 PS; 355 bhp) at 7,000 rpm, and 430 newton-metres (317 lbf⋅ft) of torque at 3,400 rpm (identification codes: AQH, AVP, AYS, BCS). The AHC Code engine was the only 4 valve V8 and featured different exhaust cams, Different Ecu tune, and a higher compression compared to the ABZ(300)bhp engine of the A8.

A sports-recalibrated version of the ZF 5HP24 five-speed tiptronic automatic transmission (parts code: 01L, identification codes: DYM, ECX) (gear ratios - 1st: 3.571, 2nd: 2.200, 3rd: 1.505, 4th: 1.000, 5th: 0.804), featuring "Dynamic Shift Programme" (DSP) was standard. European-market models also had a six-speed manual transmission option (parts code: 01E, identification code: DGV).

Torsen T-2 based quattro permanent four-wheel drive was also standard. Final drive ratio (for automatic transmission) is 3.730.

D2 suspension, brakes, wheels & tyres

A retuned, 20 millimetres (0.8 in) lowered sports suspension included a 30% stiffer spring rate and 40% more compression damping in the shock absorbers. Speed-sensitive "servotronic" power assisted steering was also standard.

The brakes featured Bosch ABS 5.3 Anti-lock Braking System, with Electronic Brakeforce Distribution (EBD), and worked radially ventilated front discs of 345 millimetres (13.58 in) in diameter by 30 mm (1.18 in) thick. The rear vented discs measured 280 mm (11.02 in) by 22 mm (0.87 in). From 2002, an upgraded Bosch ESP 5.7 Electronic Stability Programme became standard fitment.

Standard alloy wheels were 8Jx18" cast aluminium alloy "Avus" 6-spoke style, with 245/45 ZR18 Dunlop SP Sport 8000 or Bridgestone Potenza RE040 performance tyres. From 1999 model year, an 8.5Jx20" polished "9-spoke RS" wheel became an option, shod with 255/35 ZR20 Michelin Pilot Sport tyres. In 2003, 8Jx18" polished 9-spoke RS wheels became a no-cost option road wheel.

D2 body and interior

Whilst the S8 shared the aluminium monocoque of the A8, subtle detail included solid aluminium alloy door mirror housings, chrome-effect beltline and lower front grille trim, and polished twin exhaust pipes, along with subtle "S8" badging. 14-way power adjustable and heated sports front seats with memory function complement heated rear seats.

D3 (Typ 4E, 2006–2010)

Audi S8 5.2 FSI quattro (D3)

2007 Audi D3 S8 (US)
Overview
Production2006–2010
Body and chassis
PlatformVolkswagen Group D3
RelatedAudi A8 (D3)
Powertrain
Engine5.2 L V10 FSI DOHC
Transmission6-speed ZF 6HP26-A61 tiptronic automatic
Dimensions
Wheelbase2,944 mm (115.9 in)
Length5,062 mm (199.3 in)
Width1,897 mm (74.7 in)
Height1,424 mm (56.1 in)
Kerb weight1,940 kg (4,277 lb)

In the last quarter of 2005, Audi previewed the latest S8 5.2 FSI quattro (Typ 4E), based on its Volkswagen Group D3 platform stablemate, the Audi A8. Factory production commenced June 2006 and ended after 2009 along with the A8L W12, while the A8 4.2 and A8L 4.2 continued in production for the 2010 model year.

Performance

Audi's factory performance claims for the V10 S8 indicate a 0 to 100 kilometres per hour (0.0 to 62.1 mph) time of 5.1 seconds whilst consuming "SuperPlus" / "EuroSuper" 98 RON unleaded petrol. This places the S8 in a competitive range with the Maserati Quattroporte powered by a 430 hp 4.7 V8, the Jaguar XJR powered by a 400 hp supercharged 4.2 V8, the Mercedes-Benz S63 AMG (naturally aspirated 6.3L V8) and S600 (powered by a twin-turbo 5.5L V12), and the BMW 760Li (powered by a naturally aspirated 6.0L V12 engine).

The S8 has similar performance to Audi's own top-of-the-line A8L W12, though the W12 is more expensive ($120,000 USD for the W12 versus $96,000 USD for the S8), has more torque, and built on a longer wheelbase (which alone accounts for over 100 pounds of increased weight).[2] Compared to the A8L W12, the S8 has sportier mechanical features such as a firmer suspension, larger alloy wheels, and ceramic brakes. The shorter wheelbase and 10-cylinder engine save weight for better handling, but at 5.4 seconds from 0-60 mph the S8 trails the W12.[3][4][5] The S8's top speed is electronically limited to 250 kilometres per hour (155.3 mph).

D3 powertrain

Audi S8 (D3) 5.2 FSI V10 engine

Motive power in the second-generation D3 S8 powertrain features a 5.2 litre all aluminium alloy 5,204 cubic centimetres (317.6 cu in) Fuel Stratified Injection (FSI) 40-valve (four valves per cylinder) 90° V10 petrol engine (parts code: 07L, identification code: BSM). This engine is a derivative of the Gallardo's original 5.0 litre Lamborghini V10,[6] which was also developed under the Volkswagen Group ownership.

On this Audi-only variant, compared to the Lamborghini engine, it features a longer stroke and wider bore - which increases the displacement of the engine, and produces more torque at lower revs, making it more suitable for the larger and heavier full-sized luxury Audi saloon. It produces 331 kilowatts (450 PS; 444 bhp) at 7,000 rpm, and 540 newton-metres (398 lbf⋅ft) of torque at 3,500 rpm. The S8's version has its bore whittled out an additional two millimeters, increasing the displacement from 5.0 to 5.2 liters. It also has Audi's direct-injection system, called FSI. Maximum output is down from 493 horsepower at 7800 rpm in the Gallardo to 444 at 7000 rpm in the S8, and torque is up 22 pound-feet (398 pound-feet total), peaking 1000 rpm earlier at 3500 rpm.[2]

The engine utilises twin chain-driven double overhead camshafts (DOHC), and variable valve timing for both intake and exhaust valves. Engine management is by way of Bosch DI-Motronic MED 9.1 electronic engine control unit, which controls the mapped direct ignition, ten individual spark coils, common rail cylinder-direct sequential multi-point fuel injection, and drive by wire throttle.

The same 5.2 V10 engine is also used in the third-generation Audi S6 (C6), but in a slightly lower state of tune where it develops 320 kilowatts (435 PS; 429 bhp).

A sports-optimised ZF 6HP26-A61 six-speed tiptronic automatic transmission (parts code: 09E, identification codes: KLW or KZK) (gear ratios - 1st: 4.171, 2nd: 2.340, 3rd: 1.521, 4th: 1.143, 5th: 0.867, 6th: 0.691) with "Dynamic Shift Programme" (DSP) and "sport" mode, with steering wheel mounted paddle-shifters, is the only offering. Output is transmitted via Audi's trademark quattro permanent four-wheel drive system, initially using the Torsen T-2 50:50 dynamic centre differential, and from 2008 model year, utilising the latest Torsen T-3 asymmetric dynamic centre differential, with a 'default' torque distribution of 40% to the front axle and 60% to the rear. Final drive ratio is 4.055, and traction is assisted with Audi's "Electronic Differential Lock" (EDL) and "Anti-Slip Regulation" (ASR) (commonly known as traction control system) - both functions of the Bosch ESP 5.7 (or the later ESP 8.0) Electronic Stability Programme.

Although the Audi R8 5.2 FSI quattro (which shares the same 5.2L V10 engine as the S8 and S6) uses the R-tronic® transmission which is sportier and more responsive, the S8 was fitted with a tiptronic automatic transmission which is smoother (as the S8 is more luxury oriented) and provides better fuel economy.[7]

D3 suspension, steering, brakes, tyres

Rear 3/4 view of D3 Audi S8 5.2 FSI quattro

The S8, like its related A8, utilises a multi-link suspension layout front and rear, with pressurised air springs. However, for the S8, the effective spring and damper rates are noticeably firmer, along with re-engineered suspension mounts. "servotronic" speed-dependent power assisted rack and pinion steering point the S8 in the desired trajectory.

The brake system consists of radially ventilated discs all round, the fronts sized at 385 millimetres (15.2 in) in diameter by 36 mm (1.42 in) thick, and the rears at 335 mm (13.2 in) by 22 mm (0.87 in). The discs are clamped with gloss-black painted dual-piston calipers up front, and a single-piston sliding caliper at the rear, coupled to an electro-mechanical parking brake. A Bosch ESP 5.7 (later upgraded to ESP 8.0) Electronic Stability Programme, with Anti-lock Braking System (ABS), Brake Assist, and Electronic Brakeforce Distribution (EBD) complete the brake system.

Optional "Audi ceramic" Carbon fibre-reinforced Silicon Carbide (C/SiC) composite front and rear brakes are available, which use 380 mm (14.96 in) diameter by 38 mm (1.496 in) thick drilled, radially vented, and floating SGL Carbon discs, with anthracite grey painted six-piston fixed Brembo monobloc alloy calipers with the "Audi ceramic" logo up front, and 356 mm (14.02 in) by 28 mm (1.102 in) discs at the rear.

Standard alloy wheels consist of 9Jx20" cast aluminium alloy "S design", shod with either 265/35 ZR20 99Y XL performance tyres (either Bridgestone Potenza RE050A, or Yokohama Advan Sport), or 275/35 ZR20 102Y XL (Continental SportContact2, Dunlop SP SportMaxx, or Pirelli P-Zero Nero). A direct-acting tyre pressure monitoring system (TPMS) is also standard.

D3 body and interior

Dashboard of the Audi S8 D3

The S8 includes subtle detailing to distinguish it from its related A8. The trapezoidal "single-frame" grille bears the characteristic Audi "S model" vertical strut detail which are highlighted in a chrome finish. "S8" badging is displayed front and rear, whilst "V10" badges are displayed on each front wing below the side-repeater indicators. The rear boot-lid incorporates a subtle rear spoiler, and the rear is finished with four chromed oval exhaust tailpipes.

Adaptive Xenon-plus high-intensity discharge (HID) headlamps include static turning lights, along with 'swiveling' dynamic cornering lights. Daytime running lamps are five light-emitting diodes (LEDs) incorporated into a cloverleaf designed reflector, incorporated into the main headlamp housing.

The interior equipment includes two-colour leather-clad sports seats, a widescreen colour display for the Multi Media Interface (MMI), and white illuminated needles for the instrument dials.

Other notable options include the "Advanced Parking" system, which includes a rearview camera, whose output is displayed on the colour MMI monitor, with "trajectory" lines which move in conjunction with steering wheel movements.

  • Facelifted Audi S8 (2008)
    Facelifted Audi S8 (2008)
  • Facelifted Audi S8 (2008)
    Facelifted Audi S8 (2008)

D4 (2011–present)

D4
Overview
Production2011–present
Body and chassis
ClassLuxury car
RelatedAudi A8 D4
Powertrain
Engine4.0L V8
Transmission8-speed automatic
Dimensions
Wheelbase2,992 mm (117.8 in)
Length5,150 mm (202.8 in)
Width1,949 mm (76.7 in)
Height1,460 mm (57.5 in)

The D4 Audi S8 will go on sale as a 2013 model, after the 2011 Audi A8 and A8L and 2012 Audi A8L W12. Like the previous iteration, the upcoming S8 is expected to cost less than the A8L W12. A direct competitor is the Mercedes-Benz S63 AMG.[8]

The S8 can accelerate from 0 to 100 km/h in 4.2 s. It is powered by a 4.0 litre TFSI biturbo V8 engine with 382 kilowatts (519 PS; 512 bhp). The engine makes 128 hp per liter which is the highest in its class, and it utilizes cylinder deactivation so it can run as a V4 for better fuel economy.[9] This compact engine is shared with the Bentley Continental GT, Audi S6, and Audi S7, although the S6 and S7's engines has been detuned to 420 hp. [10]

Development

Initial reports suggested that the S8 would use the 5.0 litre FSI biturbo V10 engine, which currently powers the Audi RS6 (C6) with 427 kilowatts (581 PS; 573 bhp). This meant that the new S8 could make about 700-730 bhp if tuned by MTM or other chip-tuning companies.[11][12] More recently, with Audi said to be improving on the fuel economy and emissions from the previous S8's 5.2 FSI V10 and RS6's 5.0 TSFI V10 biturbo, the press expected that the 2012 S8 would have a 4.0-liter twin-turbo V8 making 450hp mated to a 7-speed double-clutch S Tronic transmission.[13]

See also

References

  1. ^ a b ETKA
  2. ^ a b "2007 Audi S8 - First Drive Review - Auto Reviews". Car and Driver. Retrieved 2011-04-02.
  3. ^ "Sports Sedans Supreme: 2007 Maserati Quattroporte Executive GT vs 2007 Audi S8 vs 2007 Mercedes-Benz S63 - Latest News, Features, and Road Tests - Automobile Magazine". Automobilemag.com. 2010-12-13. Retrieved 2011-04-02.
  4. ^ "2009 Audi S8". CanadianDriver.com. CanadianDriver Communications Inc. 9 July 2009. Retrieved 12 November 2009.
  5. ^ "2009 Audi A8 4.2 V8, A8L, W12, S8 V10 - Used Car Review / Specs / Handling / Performance Parts". Jbcarpages.com. 2007-03-03. Retrieved 2011-04-02.
  6. ^ "Review on CNet". Reviews.cnet.com. 2009-02-06. Retrieved 2010-10-20.
  7. ^ "2009 Audi S8 5.2 quattro Review Editor's Review | Page 1". Auto123.com. 2009-04-10. Retrieved 2011-08-08.
  8. ^ [1]
  9. ^ [2]
  10. ^ [3]
  11. ^ "2010 Audi A8 / 2011 Audi S8". CarAndDriver.com. Hachette Filipacchi Media U.S., Inc. 2008. Retrieved 12 November 2009. {{cite web}}: Unknown parameter |month= ignored (help) [unreliable source?]
  12. ^ "Preview: Next-gen Audi A8 saloon". MotorAuthority.com. High Gear Media. 20 July 2009. Retrieved 12 November 2009.
  13. ^ [4]
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