Volvo B8444S engine

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Volvo B8444S
2006 Volvo XC90 V8 engine.jpg
B8444S installed in a 2006 Volvo XC90
Configuration60° V8
Displacement4,414 cc (4.4 L; 269.4 cu in)
Cylinder bore94.0 mm
Piston stroke79.5 mm
Block materialAluminium
Head materialAluminium
Compression ratio10.4:1[1]
Fuel typePetrol
Cooling systemWater-cooled
Power output232 kilowatts (311 hp)[1]
Torque output440 N⋅m (325 lb⋅ft)[1]
Length754 mm
Width635 mm
Dry weight190 kg (420 lb)
PredecessorVolvo V8

The B8444S is a V8 automobile engine developed by Yamaha Motor Corporation[2] for Volvo Cars. It is built in Japan and based on Volvo designs.


Volvo began offering a 4.4 L V8 engine in its large P2 platform automobiles in 2005.[3] It was initially offered only for the Volvo XC90[3][4] but later found its way in the second generation Volvo S80.[2] and mated to a six speed Aisin Seiki transmission of Japan also with a Swedish Haldex all wheel drive system AWD. The 4.4 L V8 Volvo engine was built by Yamaha in Japan under Volvo design and specifications.

The engine was unique in Ford's wide range of V8 engines in that it is designed for transverse use and has a V6-like 60° bank angle. Officials of all three companies involved insist that the Volvo V8 is not related to the SHO engine; the die-cast open-deck aluminum Volvo block is clearly different from the sand-cast closed-deck aluminum SHO engine block although the two engines share many common dimensions including bore centers, stroke, bearing journal diameters, and deck height.

As revealed in BBC's Top Gear show (Series 14 Episode 5) this basic engine is also used in the Noble M600, albeit longitudinally mounted, developing some 650 horsepower with the addition of 2 turbochargers. The Noble unit is custom built by a 3rd party firm expressly for Noble Cars UK.

Volvo discontinued the engine subsequent to its change in ownership and management in August, 2010. The new management intends to offer a single engine across all Volvo models, ultimately a four cylinder. <Motor Trend, August, 2010.>

At that point in time Volvo was owned by Ford.


As a Volvo V8, this new engine uses the similar Volvo engine naming system. The engine is called the Volvo B8444S. B being for bensin (gasoline), 8 for the number of cylinders, 4.4 for the total displacement of the engine, the last 4 for the number of valves per cylinder and S for suction, meaning it's naturally aspirated. This engine also uses original Volvo parts.

The engine is a 4.4 L aluminum DOHC V8 which produces 315 PS (232 kW; 311 hp) and 440 N⋅m (325 lb⋅ft). It has a 60 degree cylinder bank. The engine block and heads are cast from aluminium reducing its weight to a comparatively light 418 lb (190 kg).


A 5.0 litre version was developed for use in Volvo S60s by Garry Rogers Motorsport in the V8 Supercars series between 2014 and 2016.[5]


The engine block is also used for the Yamaha F300V8, F350V8, and XTO Offshore outboards. The displacement ranges from 5.3 to 5.6 litres.

This displacement increase was achieved by increasing the stroke to 96mm. The heads are also modified to “reverse flow” types where the inlet ports are on the outside of the engine, and the exhaust ports exit in towards the Vee of the engine. This allows a single exhaust exit path from the center of the engine which aids packaging the unit into an outboard form factor. The compression ratio was also dropped to 9.6:1. Whilst not ideal from an efficiency standpoint, it does reduce heat and stress on the engine which increases durability; an essential attribute for marine duty. It also allows 87 octane rated fuels to be used.

The latest development of this outboard is called the ”XTO Offshore” and is rated at 425hp. It has an increased displacement of 5.6 litres achieved by increasing the bore diameter from 94mm to 96mm. The stroke remains the same, however the compression ratio is now 12:1. It also utilizes a gasoline direct injection system, a first for a 4-stroke outboard engine, and it requires 89 Octane rated fuel.


  1. ^ a b c "2008 Volvo S80 specifications". Volvo Car Corporation. 2007. Archived from the original on 2016-03-04. Retrieved 2017-08-17.
  2. ^ a b Jonathan Elfalan (11 May 2007). "2007 Volvo S80 V8 AWD". Retrieved 2017-08-17.
  3. ^ a b Frank Wald (15 March 2005). "Volvo XC90 V8: Fauchendes Kraftpaket" [Volvo XC90 V8: Hissing powerhouse]. (in German). Retrieved 2017-08-17.
  4. ^ Volvo Car Corporation (10 January 2005). "Volvo XC90 gets the state-of-the-art V8 powertrain". Retrieved 2017-08-17.
  5. ^ Daniel DeGasperi (17 June 2013). "Volvo announces V8 Supercars program, using Yamaha V8". Retrieved 2013-06-17.