Land Rover Discovery

Land Rover Discovery
Overview
Manufacturer	Land Rover
Production	1989–present
Assembly	Solihull, England
Body and chassis
Class	Mid-size SUV
Layout	Front engine, four-wheel drive

The Discovery is a four wheel drive on-road and off-road vehicle from the British car maker Land Rover. There have been three generations of the vehicle, which is less expensive than the company's top Range Rover model. The Discovery was introduced in the late 1980s and is the most popular model from Land Rover. It is less utilitarian than the Defender, but it is very competent off road. The current Discovery Series III is marketed in North America as the LR3.

Discovery Series I

Series I
Overview
Also called	Honda Crossroad (Japan)
Production	1989–1999
Body and chassis
Body style	4-door SUV 2-door SUV
Powertrain
Engine	2.0 L I4 2.5L 200/300TDI I4 3.9 L 182 hp (136 kW) V8
Transmission	4-speed automatic 5-speed manual
Dimensions
Wheelbase	Template:Auto in
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The Discovery was introduced into the United Kingdom in 1989. The company code-named the vehicle "Project Jay", and came close to calling it either "Highlander" or "Prairie Rover" until the decision was made to improve the overall branding strategy, eventually leading to the Land Rover name becoming detached from any specific model (at the launch of the "Defender" name.) The new model was based on the chassis and drivetrain of the more upmarket Range Rover, but with a lower price aimed at a larger market segment and intended to compete with Japanese offerings. This was the only Discovery generation with a four-cylinder.

The Discovery was initially available in a three door version, partly to avoid eating into the market of the more expensive Range Rover. The five door became available the following year. Both were fitted with five seats, and an option was made available to have two further seats fitted in the "boot" area at the back of the car. In a move almost unique at the time, Land Rover employed an external consultancy, Conran Design Group in London, to design the interior. The brief was to ignore current car interior design and position the vehicle as a 'lifestyle accessory', a new concept in the late 80's which was enormously influential in automotive design in the years to follow. Discovery's Mk 1 interior incorporated a number of original features, though as with all design projects, many ideas shown on the original interior mock-ups constructed inside a Range Rover bodyshell at Conran's workshops were left on the shelf, such as a custom sunglasses holder built into the centre of the steering wheel (these were pre-airbag days). Despite this the design was unveiled to critical acclaim, and won a British Design Award in 1989.

A two-seater, three-door Discovery Commercial version, lacking rear windows, was later offered by Land Rover Special Vehicles. Pre-1994, the Discovery was available with either the 2.5 litre 200 Tdi engine or the 3.5 litre Rover V8. Early V8s used a twin SU carburettor system, moving over to Lucas fuel injection in 1990. In the UK, V8 models are comparatively rare, the majority of Discovery owners preferring the more economical diesel engines. Consequently, resale prices of V8-engined vehicles are lower than the more popular diesel counterparts. In the North American market, the only engine available was the V8. A 2.0 litre petrol engine from the Rover stable was briefly available in a model known as the 2.0 L Mpi I4. This was intended to attract fleet managers, since UK (and also Italian) tax laws benefited vehicles under two litres. A combination of changes in taxation and the engine being underpowered for such a heavy vehicle led to the demise of this engine, despite the kudos of being the engine fitted to several Discoveries supplied to the British Royal family, most notably driven by Prince Philip around Windsor Great Park, in his position as Park Ranger of the park.

Pre-1995 Discovery Series I

In 1994, many changes were made to the Discovery I and reached some markets as "Discovery 2"; the 200Tdi and 3.5 L V8 engines were replaced with the 2.5 L 300TDi 4-cylinder and 3.9 L Rover V8 engines, the 300Tdi introducing a Bosch electronic emissions control for certain models and markets. At around this time a stronger R380 gearbox was fitted to all manual models combined with the flexible cardan coupling GAJ-1 from SGF for more comfort. The newer models featured larger headlamps and a second set of rear lights in the bumper. The new rear lights had the wiring changed several times to meet real or expected European safety legislation. Some vehicles are left with an arrangement where the vulnerable bumper contains the only working direction-indicator lights; other examples have these lights duplicated in the traditional rear pillar location.

The designers of the original model had been forced to economise and use the "parts-bin" of the then parent-company, Rover. The 200 series used the basic bodyshell structure from the Range Rover, door handles from the Morris Marina, tail lights from the Austin Maestro van, and interior switchgear and instrumentation from the Rover "parts bin". The favour was returned when the facelifted Discovery dashboard was also fitted as part of the final facelift to the first-generation Range Rover, though with minor differences reflecting the vehicle's higher status, such as an analogue rather than digital clock.

1994 (model year) marked the first year that the Discovery was sold in the United States. Airbags were incorporated into the design of the 1995 model to meet the requirements of US motor vehicle regulations, though they were not fitted as standard in all markets. 1995 models sold in the US utilised the 3.9 L V8 from the Range Rover SE models, later models saw a displacement increase to 4.0 L.

Technically speaking the 1996–1998 US models with 4.0 L engines had the same displacement as the 3.9 L engines fitted to the earlier 1994–1995 US models. In earlier 3.9 L US engines the fuel injection computer (14CUX) did not control the ignition, it was controlled by a traditional system with ignition coil and distributor made by Lucas. The 4.0 L engines had a few important differences: larger, cross-bolted main bearings, revised pistons, revised intake and a new distributorless engine management system. This system was called GEMS. It was developed jointly by Lucas and SAGEM and it controlled both spark and fuel injection. Unlike the earlier systems fitted to Rover V8 engines, GEMS was made OBD-II compliant. The improvements were made because Rover needed to meet tighter US and California emissions standards.

As with all Land Rover vehicles designed since the Series models, which had switchable two and four-wheel drive, the transmission is a permanent four wheel drive system, with a locking centre differential at the transfer box. In common with much of the rest of the Land Rover range, the handbrake acts on the transmission at the back of the transfer box.

In Japan, a badge-engineered version of the Series I was offered, called the Honda Crossroad. (The Rover companies had cross-holding relationship with Honda U.K. since early 80's. The relationship ended after Rover was taken over by BMW in 1994.) (Honda revived the nameplate 'Crossroad' in another small sport utility vehicle in 2007.) As of recent times the Land Rover Discovery has become the vehicle of choice when owners want to enhance the car to improve its offroad capability or when offroaders are looking for a tough vehicle. Many owners will build up their Discovery with offroad modifications like suspension lifts, bullbars, larger tyres and traction differentials. There are various companies that are making addons for the Discovery and the Discovery is a sought after 4x4.

Discovery Series II

Series II
Overview
Production	1999-2004
Body and chassis
Body style	4-door SUV
Powertrain
Engine	2.5 L Td5 I5 4.0 L V8 4.6 L 217 hp (162 kW) V8
Transmission	4-speed automatic 5-speed Manual
Dimensions
Wheelbase	Template:Auto in
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The Series II Discovery debuted in autumn 1998 and in the US in 1999. Land Rover promoted that the Discovery Series II had been extensively modified to the extent of no less than 720 'differences', albeit most were very subtle. The interior and exterior was re-worked to be less utilitarian, but it was still very similar to the Series I. However, every body panel was new (and incompatible) except the rear door outer skin. The rear body was extended to improve load space but at the expense of added rear overhang, which adversely impacted off-road ability. However, overall off-road ability remains impressive and in practical terms, choice of tyres is far more relevant. Changes to the diesel engined models saw the 2495 cc Td5 (in-line direct-injected 5 cylinder) engine introduced, in line with the updated Defender models. This electronically managed engine was smoother, producing more usable torque at lower revs than its 300 Tdi predecessor. The Td5 engine is often mistakenly attributed to BMW but the engine was derived from the Rover L-series passenger car engine and developed by Land Rover. The 3948 cc V8 petrol version was given a revised intake system, and rebadged as 4.0 litres at the same time, despite no actual increase in cc over the previous 3.9 L engine. ACE (Active Cornering Enhancement, an electronically controlled hydraulic anti-roll bar system) was fitted to some versions, which reduced cornering roll to insignificant proportions. Self-levelling air springs were fitted to some models and European type-approval for 7-seat vehicles was only given for air-sprung cars.

The locking centre differential was still fitted until early 2001, although the linkage to operate it was not attached, as Land Rover believed that the traction control and newly-developed Hill Descent Control would render it redundant. The actual locking mechanism was removed in early 2001, before being fully reinstated (with linkage) when the face-lifted model arrived in 2003. Whilst the traction control system worked very effectively, it did not offer the same level of control and smooth operation as the vehicles fitted with the diff lock. Aftermarket manufacturers began offering kits to allow the lock to be fully operational, which simply consists of a linkage on pre 2001 models, but requires the linkage and locking mechanism to be installed on 2002 models. Customer demand saw the diff-lock controls fully reinstated as a cost option only (standard on top of range HSE/ES vehicles) on UK/Irish models. The "face-lift" models are easily identified by new "pocketed" headlamps which matched the Range Rover and face-lifted Freelander models. As with earlier models, however, this can be deceptive since kits are available to modify 1998–2002 vehicles with the newer lights.

A small number of Discovery II Commercial models were produced by Land Rover Special Vehicles, this time based on the five-door bodyshell but with the windows rendered opaque to give van-like appearance and security. Normal vehicles were exported to Republic of Ireland, where the rear side windows were smashed and rear seats were destroyed in the presence of a Revenue official, to offer a model that avoided the Vehicle Registration Tax (saving approximately 40%).

In the final production run of the Discovery II, only two models were offered for sale in the UK market, the 'base' Pursuit, which still retained a high level of equipment as 'standard' and the 'top spec' Landmark, which offered all Leather interior, twin sunroofs, ACE (Active Cornering Enhancement) six disc CD player and Heated Windscreen. The final vehicles left the production lines in late May 2004 to make way for the all new Discovery 3 (LR3) models

The Commercials released by Special Vehicles came with rear self levelling suspension as standard, and on the 02+ facelifted vehicles the rendered windows are fixed in place so a retrofit of seats is not viable without significant effort. The last revision of this vehicle still had a high spec and came with climate control, roof bars, alloy wheels & marine ply boarding in the loadspace as standard.

Cargo length = 53 inches
Cargo width = 44 inches
Cargo height = 41 inches

Discovery 3 / LR3 / LR4

Series III
Overview
Also called	North America: Land Rover LR3 (2005-2009) Land Rover LR4 (2010-)
Production	2005-present
Designer	Andy Wheel
Body and chassis
Body style	4-door SUV
Related	Range Rover Sport
Powertrain
Engine	2.7 L TdV6 V6 Diesel 4.0 L 216 hp (161 kW) V6 4.4 L 300 hp (220 kW) V8
Transmission	6-speed manual 6-speed automatic
Dimensions
Wheelbase	Template:Auto in
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Height	2005-06: Template:Auto in 2007-Present: Template:Auto in

On 2 April 2004, owners Ford Motor Company introduced a new Discovery 3 (or LR3 in North America) for the 2005 model year.

The Series II Discovery was long over-due for replacement. Although still a capable and popular vehicle, its chassis, coil-spring suspension and beam-axle layout had changed very little since the launch of the original Discovery in 1989. In turn, that vehicle used essentially the same underpinnings as the original Range Rover, launched in 1970. The Discovery II was beginning to lose sales to more sophisticated 'working' 4x4 vehicles from Japan (such as the Toyota Land Cruiser and Mitsubishi Shogun) and 'sports' 4x4s from Europe (such as the BMW X5 and Mercedes-Benz M-Class). A replacement vehicle had been planned for many years, but the project had been delayed many times due to the break up of the Rover Group in 2000 and the need to replace the Range Rover in 2001.

The Discovery 3 was an entirely new design, sharing not a single component with the outgoing model. Its styling is still traditional Land Rover, with function dictating the look, rather than fashion, and with lots of horizontal and vertical lines. It retains the key features of the Discovery, such as the stepped roofline and steeply-raked windscreen. The LR3 name was chosen for North American markets due to negative quality associations with the Discovery name and (according to Land Rover) a preference in the American market for alpha-numeric model designations (the Freelander 2 would also be re-designated for the North American market as the LR2).

Construction-wise, Land Rover developed an all-new method which they called Integrated Body Frame (IBF). The previous Discovery models had used a traditional, strong ladder-frame chassis. Whilst being specifically designed for off-road use, ladder-frame chassis' are heavy and detract from the on-road handling of the vehicle. Monocoque vehicles are more rigid, giving improved high-speed handling, but can be damaged by the stresses involved in heavy off-road use. In the IBF the body, the engine bay and passenger compartment is built as a monocoque, which is mated to a basic ladder-chassis holding the gearbox and suspension. It claimed to combine the virtues of both systems, but does make the Discovery 3 uncommonly heavy for its size stunting on-road performance and off-road agility, especially in soft ground such as sand. This was one of the reasons that the new Discovery became the first Land Rover to be offered with a rear locking differential.

Another big change was the fitting of full independent suspension (FIS). Like the Series III Range Rover, this was an air suspension system, which allowed the ride-height of the vehicle to be altered by simply pumping up or deflating the air bags. The vehicle can be raised to provide ground clearance when off-road, but lowered at high speeds to improve handling. FIS had been seen as inferior to the older beam-axle when off-road due to its tendency to make the vehicle bottom out. Land Rover developed 'cross-linked' air suspension to solve this problem- when needed, the suspension mimics the action of a beam axle (as one wheel drops, the other rises). Further more, if the chassis of the vehicle contacts the ground when the suspension was at its 'off road' height, the system senses the reduction in load on the air springs and raises the vehicle an extra inch. In the UK and European markets, a coil-spring independent suspension system was offered on the base model. This model was unique in the range by having only 5 seats and only being available with the 2.7 litre diesel engine. This model lacked the Terrain Response system (see below).

All this was designed to make the new vehicle suitable for a changing 4x4 market. Ultimate off-road ability was becoming less important compared to refined on-road manners. Land Rover were determined that the Discovery 3 would retain the brand's reputation as a top-performing off-road vehicle, whilst also being a good road car. Whilst the Discovery 3 was not as good in the handling stakes as some of the competition, it was much improved over the previous models and its off-road credentials remained intact.

The engines used in the Discovery 3 were all taken from Land Rover's sister company, Jaguar. A PSA Peugeot-developed 2.7 litre, 195 hp (145 kW) V6 diesel engine (the TdV6) was intended to be the biggest seller in Europe. For the US-market and as the high-performance option elsewhere, a 4.4 litre petrol V8 of 300 hp (220 kW) was chosen. A 216 hp (161 kW) 4.0 litre SOHC V6 petrol engine taken from the Ford stable was available in North America and Australia. Before launch, there were rumours that Land Rover may introduce the diesel unit to the American market, but the use of high-sulphur diesel fuel there, for which the TdV6 is not designed, made this fitment unlikely.

The gearboxes on the Discovery 3 were also all-new. For the diesel engine, a 6-speed manual gearbox was standard. As an option, and as standard on the V8 engine, a 6-speed automatic transmission was available. Both came with a 2-speed transfer box and permanent 4-wheel-drive. A computer controlled progressively locking central differential ensured traction was retained in tough conditions. A similar differential was available on the rear axle to aid traction.

The Discovery 3 was fitted with Land Rover's full armoury of electronic traction control systems. Hill Descent Control (HDC) prevented vehicle 'runaways' when descending steep gradients and 4-wheel Electronic Traction Control (4ETC) prevented wheel spin in low-traction conditions. An on-road system, Dynamic Stability Control (DSC) prevented skidding when steering and braking at speed.

Arguably the biggest feature of the new vehicle was the innovative 'Terrain Response' system (this system won a Popular Science award in 2005). Previously, off-road driving had been a skill that many drivers found daunting. A wide-ranging knowledge of the vehicle was needed to be able to select the correct gear, transfer ratio, various differential systems and master various techniques required for tackling steep hills, deep water and other tough terrain. Terrain Response attempted to take away as many of the difficulties as possible. The driver selected a terrain type on a dial in the cab of the vehicle (the options are "Sand", "Grass, Gravel & Snow", "Mud & Ruts" and "Rock Crawl".) The on-board computer systems then select the correct gearbox settings, adjust the suspension height, adjust the differential lock settings and even alter the throttle response of the engine suitable for the terrain. For example, in "Rock Crawl", the suspension is raised to its maximum height and set to allow maximum wheel articulation, the differentials are locked, the driver is prompted to switch to Low Range, and the throttle response is altered to provide low-speed control. In "Sand" mode, the traction control system is 'primed' to be more sensitive to any wheelspin, the differential locks are partly locked up and the throttle response is re-mapped to produce high power outputs with short pedal movement. The driver retained some manual control over the off-road systems, being able to select the Transfer Box ratio and the suspension height manually, although use of the Terrain Response system is needed to allow full use of the vehicles' capabilities.

As well as new mechanical and electronic systems, the Discovery 3 introduced much more advanced and modern design to the interior and exterior of the vehicle. The original 1989 Discovery's looks had been determined by limited funds and the consequent use of first-generation Range Rover components. These continued to influence the Series II. The Discovery 3 was able to have a fresh, minimalist style. The interior was much improved, with a highly flexible seven seat layout. Unlike the older models, adults could comfortably use all seven seats. Passengers in the rearmost row now entered through the rear side doors, instead of the tailgate as in previous versions. The driver benefited from a modern DVD navigation system. This system was unique to Land Rover because, in addition to the typical road map navigation, it included an off-road navigation and four-wheel drive information mode. When in four-wheel drive information mode, the screen showed a schematic of the vehicle, displaying the amount of suspension movement, angle the front wheels were steering, the status of the locking differentials and icons showing which mode the Terrain Response was in, and what gear was selected on automatic versions.

The vehicle was very well received by the press on its launch, with the Terrain Response system, vastly improved on-road dynamics and clever interior design being selected for wide praise. The new look was disliked by some (descriptions such as 'van-like' were used), and the large, blank rear panel, now devoid of the spare wheel, was a controversial point. Others pointed out that the diesel engine still lagged behind the competition in power (especially given the weight of the vehicle), but overall the vehicle scored highly. A high-point in the new Discovery's launch season came when Jeremy Clarkson of the BBC's Top Gear motoring show drove one to the top of Cnoc an Fhreiceadain, a 307 m (1,007 ft) mountain near Tongue in northern Scotland, where no vehicle had previously reached. Richard Hammond, also of Top Gear fame, lauded it as the "Best 4X4 of all time".

In Australia, the vehicle was awarded "4WD of the Year" by virtually all of the 4WD press, impressing often conservative journalists of "hard-core" magazines after it effortlessly ambled where the traditionally highly-rated Toyota Land Cruiser and Nissan Patrol had to scramble. It was widely hailed as the first time that electronics actually out-performed trusted mechanical systems, although most sounded a note of caution about long-term reliability and serviceability. Despite these reviews, and a price tag very similar to the Land Cruiser, it did not set the market alight.

Amongst the off-road driving and Land Rover enthusiast community, the all-new Discovery has gradually gained acceptance. Given the improved road-going qualities of the vehicle, many were worried that the vehicle's off-road abilities would be compromised, and others expressed doubts about relying on electronic systems in extreme conditions. However, by 2006, 2 years after the vehicle's launch, the vehicle's abilities and reliability have been proved both by the press and private owners. Land Rover and many aftermarket companies have developed off-road equipment such as winch, bull-bars, under-body protection kits, snorkels and roof-racks for the new Discovery, to optimise its off-road use.

In 2006 Land Rover used the Discovery 3 in its G4 Challenge, alongside the Range Rover Sport. The vehicles used are all in standard mechanical form, and are fitted with equipment from the standard Land Rover brochures.

Since its launch, Discovery 3 / LR3 has won 97 international awards, including 'Best Compact 4x4' at the WHATCAR? awards,North American Truck of the Year award and won Motor Trend magazine's Sport/Utility of the Year for 2005. It also won a Popular Science award on account of its ground-breaking on-board systems. 97 international awards for just one production 4x4 is considered to be a world record.

The first all-new model placement since the Freelander, the Range Rover Sport is based on the Discovery 3 platform, rather than on the larger Range Rover.

There is a facelift model of the Discovery 3 (2009 Model Year) which will be made in the UK from August 2008 onwards. It will offer an upgrade to the stereo system (Harmon Kardon) as standard with integrated steering wheel controls and a six CD stacker, clear indicator side lights, and colour coded bumpers. In North America, the vehicle was renamed LR4, and the LR4 debuted at the 2009 New York International Auto Show.

Discovery 4

Series IV
Land Rover D4
Overview
Also called	North America: Land Rover LR3 (2005-2009) Land Rover LR4 (2010-)
Production	September 2009 -
Designer	Andy Wheel
Body and chassis
Body style	4-door SUV
Related	Range Rover Sport
Powertrain
Engine	3.0L TDV6 Diesel 4.0 L 241 hp (180 kW)
Transmission	ZF 6-speed manual ZF 6-speed automatic
Dimensions
Wheelbase	Template:Auto in
Length	Template:Auto in
Width	Template:Auto in
Height	2005-06: Template:Auto in 2007-Present: Template:Auto in

The new, fourth generation of Land Rover's supremely versatile seven-seat vehicle gains a new name - Discovery 4 - to go with its powerful and highly efficient new TDV6 diesel engine, fresh exterior identity and more premium cabin. The class-leading breadth of capability is extended even further with dynamic improvements for both road and off-road driving, and Land Rover has added a battery of user-friendly new technologies and features.

Star billing on the Land Rover Discovery 4 goes to the highly efficient and refined new LR-TDV6 3.0 twin turbo diesel engine. This delivers a 9 percent fuel economy improvement (EU combined cycle) and ten percent less CO2 emissions, at the same time as increasing power by 29%, all compared with the existing 2.7-litre engine. Torque increases even more, up 36% to 600Nm - believed to be the highest torque output of any 6-cylinder, production diesel, passenger vehicle engine in the world.

The Land Rover Discovery 4's power and torque are both accessible across the entire rev range, to deliver immediate throttle response and effortless cruising ability. The results include a 0-60mph time of 9.0 seconds, (0-100 km/h in 9.6 seconds), a 24 percent improvement over the 2.7-litre.

Land Rover's engineers have also transformed the on-road ride and handling for the new generation Discovery 4, and even improved on the near-legendary off-road capabilities of its predecessor. The comprehensive changes include new suspension components, revised steering, larger brakes, improved traction control, and enhancements to the award winning Terrain Response system, which helps optimise the vehicle for virtually all on-road or off-road driving situations.

The iconic exterior design of the Land Rover Discovery 4 has been updated, most obviously with smoother and simpler surfaces at the front, including a new, more aerodynamic bumper. The sportier new lights help give the vehicle new character, and include LED technology front and rear. The sophisticated new front headlights include High Beam Assist, switching on or off, as conditions require.

The Land Rover Discovery 4's interior is completely redesigned, with a transformed dash and centre console, new seats and an array of new, user friendly features.

The new engine has been optimised for low-end torque as well as economy, making it possible to activate the lock-up clutch of the ZF HP-28 automatic transmission at lower speed. This reduces 'slip' in the hydraulic torque converter improving both fuel consumption and CO2 emissions. The higher torque at lower rpm also enables longer gearing for more economical cruising.

The Land Rover Discovery 4 incorporates several other energy saving features too. At standstill, the idle speed of the V6 has been reduced from 750rpm to 710rpm, giving a fuel saving without compromising refinement. An Intelligent Power Management System includes Smart Regenerative Charging, so whenever possible the alternator charges the battery when it is most economical to do so, such as when the car is coasting rather than accelerating.

Aerodynamic changes to the front end, with the revised front lower chin spoiler and new front wheel deflectors, help to reduce drag by increasing underfloor airflow.

The new air conditioning pump is driven through a clutch which disengages when the air conditioning is not in use reducing parasitic losses and delivering improvements in fuel consumption and CO2 emissions.

External links

• Land Rover Official Web Site
• InspiringMen/ - Land Rover LR Discovery 3 review
• Top Gear Series 5 - Episode 3 - Top Gear website, including streaming video of the infamous Discovery test
• Land Rover Discovery 3 Review - An in-depth look at the Discovery 3 with Road Test
• roverhaul.com - Discovery / LR3 Picture Gallery