The SI6 (Short Inline 6) is a family of

straight-six engine A straight-six engine (also referred to as an inline-six engine; abbreviated I6 or L6) is a piston engine with six cylinders arranged in a straight line along the crankshaft. A straight-six engine has perfect primary and secondary engine balanc ...

s developed by

Volvo The Volvo Group (; legally Aktiebolaget Volvo, shortened to AB Volvo, stylized as VOLVO) is a Swedish multinational manufacturing corporation headquartered in Gothenburg. While its core activity is the production, distribution and sale of truck ...

and used by Land Rover and Volvo.

History

Volvo designed the SI6 ("short inline 6") straight-six

automobile A car, or an automobile, is a motor vehicle with wheels. Most definitions of cars state that they run primarily on roads, Car seat, seat one to eight people, have four wheels, and mainly transport private transport#Personal transport, peopl ...

engine for use in 2007 models. An evolution of the company's long-used straight-five Volvo Modular engine, which itself is an evolution of the Volvo B6304 straight-six engine, the SI6 can be mounted

transverse Transverse may refer to: *Transverse engine, an engine in which the crankshaft is oriented side-to-side relative to the wheels of the vehicle *Transverse flute, a flute that is held horizontally * Transverse force (or ''Euler force''), the tangen ...

ly for

front wheel drive Front-wheel drive (FWD) is a form of internal combustion engine, engine and transmission (mechanics), transmission layout used in motor vehicles, in which the engine drives the front wheels only. Most modern front-wheel-drive vehicles feature ...

all wheel drive An all-wheel drive vehicle (AWD vehicle) is one with a powertrain capable of providing power to all its wheels, whether full-time or on-demand. Types The most common forms of all-wheel drive are: ;1x1 : All unicycles Reflects one axle with ...

applications. Despite the added cylinder and displacement, the engine remains compact, and is in fact shorter than the previous straight-five. The engine was initially offered in two displacements — a 3.0 L

turbocharged In an internal combustion engine, a turbocharger (also known as a turbo or a turbosupercharger) is a forced induction device that is powered by the flow of exhaust gases. It uses this energy to compress the intake air, forcing more air into the ...

version and a 3.2 L

naturally aspirated A naturally aspirated engine, also known as a normally aspirated engine, and abbreviated to N/A or NA, is an internal combustion engine in which air intake depends solely on atmospheric pressure and does not have forced induction through a turboc ...

version. Both offered

variable cam timing Variable camshaft timing (VCT) is an Car, automobile variable valve timing technology developed by Ford Motor Company, Ford. It allows for more optimum engine performance, reduced emissions, and increased fuel efficiency compared to engines with f ...

, though only the turbo version varies both the intake and

exhaust valve A poppet valve (also sometimes called mushroom valve) is a valve typically used to control the timing and quantity of petrol (gas) or vapour flow into or out of an engine, but with many other applications. It consists of a hole or open-ended ch ...

s. On top of the variable cam timing used on the intake cam of the naturally aspirated engine it also had

variable valve lift Variable valve lift (VVL) is an automotive piston engine technology which varies the height a valve opens in order to improve performance, fuel economy or emissions. There are two main types of VVL: discrete, which employs fixed valve lift amounts, ...

by using Cam Profile Switching (CPS). Production of the Volvo SI6 began at the Ford Bridgend Engine Plant in

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in May 2006. It was assumed that the engines would be used in European Ford and Jaguar products as well as Volvos.

Nomenclature

The engine codes consist of a series of letters and digits: * 1st: Fuel type (B) B = Bensin (Petrol) * 2nd: Number of cylinders (6) * 3rd & 4th: Approximate displacement in deciliters, may be rounded up or down. (29 ~= 3.0 L) * 5th: Valves per cylinder (4) * 6th: Induction method (S/T) S = suction (naturally aspirated), T = turbocharged * 7th: Engine variant (2/4/5) Engine codes are not necessarily unique to a specific engine as power levels can vary depending on market, manufacturer and model.

3.0

The straight-six engine is

intercooled An intercooler is a heat exchanger used to cool a gas after compression. Often found in turbocharged engines, intercoolers are also used in air compressors, air conditioners, refrigeration and gas turbines. Internal combustion engines Most ...

and turbocharged. Cylinder bore and stroke are with a compression ratio of 9.3:1.

B6304T2

The B6304T2 has a power output of at 5600 rpm, and produces of torque at 1500–4800 rpm. Applications: * 2008–2010 Volvo S80 II badged as ''S80 T6'' or ''S80 T6 AWD'' * 2008–2010 Volvo S80L badged as ''S80L T6'' or ''S80L T6 AWD'' * 2008–2010 Volvo V70 III badged as ''V70 T6'' or ''V70 T6 AWD'' * 2009–2010 Volvo XC70 II badged as ''XC70 T6'' or ''XC70 T6 AWD'' * 2009–2010 Volvo XC60 badged as ''XC60 T6'' or ''XC60 T6 AWD''

B6304T4

The ''B6304T4'' has a power output of at 5600 rpm, and produces of torque at 2100–4200 rpm. Applications: * 2011–2015 Volvo S80 II badged as ''S80 T6'' or ''S80 T6 AWD'' * 2011–2015 Volvo V70 III badged as ''V70 T6'' or ''V70 T6 AWD'' * 2011–2015 Volvo XC70 II badged as ''XC70 T6'' or ''XC70 T6 AWD'' * 2011–2016 Volvo XC60 badged as ''XC60 T6'' or ''XC60 T6 AWD'' * 2011–2015 Volvo S60 II badged as ''S60 T6'' or ''S60 T6 AWD'' * 2011–2018 Volvo V60 badged as ''V60 T6'' or ''V60 T6 AWD''

B6304T5

The ''B6304T5'' has a power output of at 5250 rpm, and produces of torque at 3000–4750 rpm. Applications: * 2014–2016 Volvo S60 II badged as ''S60 Polestar'' * 2015–2016 Volvo V60 badged as ''V60 Polestar''

3.2

The straight-six engine is naturally aspirated. Cylinder bore and stroke are with a compression ratio of 10.8:1.

B6324S

The B6324S has a power output of at 6200 rpm, and produces of torque at 3200 rpm. Applications: * 2007–2010

Volvo XC90 The Volvo XC90 is a Executive car, mid-size luxury SUV manufactured and marketed by Volvo Cars since 2002 and now in its second generation. The first generation was introduced at the North American International Auto Show#2002, 2002 North Ameri ...

badged as ''XC90 3.2'' * 2007–2010 Volvo S80 II badged as ''S80 3.2'' or ''S80 3.2 AWD'' * 2008–2010 Volvo V70 III badged as ''V70 3.2'' or ''V70 3.2 AWD'' * 2008–2010 Volvo XC70 II badged as ''XC70 3.2'' * 2010 Volvo XC60 badged as ''XC60 3.2 AWD''

B6324S2

The B6324S2 has a power output of at 6200 rpm, and produces of torque at 3200 rpm. Applications: * 2010 Volvo S80 II badged as ''S80 3.2'' * 2010 Volvo XC70 II badged as ''XC70 3.2'' * 2010 Volvo XC60 badged as ''XC60 3.2''

B6324S4

The B6324S4 has a power output of at 6200 rpm, and produces of torque at 3200 rpm. Applications: * 2011–2014 Volvo S80 II badged as ''S80 3.2'' * –2014 Volvo XC70 II badged as ''XC70 3.2'' * –2014 Volvo XC60 badged as ''XC60 3.2''

B6324S5

The B6324S5 has a power output of at 5600 rpm, and produces of torque at 3200 rpm.
In its PZEV version power output is reduced to and produces of torque. Applications: * 2011–2014

badged as ''XC90 3.2'' *2011–2014 Volvo S80 II badged as ''S80 3.2'' * 2011–2014 Volvo V70 III badged as ''V70 3.2'' * 2011–2015 Volvo XC70 II badged as ''XC70 3.2'' * 2011–2014 Volvo XC60 badged as ''XC60 3.2'' Applications: * 2006–2012 Land Rover Freelander 2/LR2

References

{{reflist SI6 SI6 Land Rover engines Straight-six engines Gasoline engines by model