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Volvo SI6 engine

The SI6 (Short Inline 6) is a family of straight-six engines developed by Volvo and used by Land Rover and Volvo.

History

Volvo designed the SI6 ("Short Inline 6") straight-six automobile engine for use in 2007 models. An evolution of the company's long-used straight-five Modular engine, which itself was an evolution of the Volvo B6304 straight-six engine, the SI6 can be mounted transversely for front wheel drive or all wheel drive applications. Despite the added cylinder and displacement, the engine remains compact, and is in fact shorter than the original straight-five. The engine was initially offered in two displacements — a 3-litre turbocharged version and a 3.2-litre naturally aspirated version. Both offered variable cam timing, though only the turbo version varies both the intake and exhaust valves. On top of the variable cam timing used on the intake cam of the naturally aspirated engine it also had variable valve lift by using Cam Profile Switching (CPS).

Production of the Volvo SI6 began at the Ford Bridgend Engine Plant in Wales 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
  • 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 initial, straight-six engine is intercooled 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:

B6324S2

The B6324S2 has a power output of at 6200 rpm, and produces of torque at 3200 rpm. Applications:

B6324S4

The B6324S4 has a power output of at 6200 rpm, and produces of torque at 3200 rpm.

Applications:

B6324S5

The B6324S5 has a power output of at 5600&nbsp;rpm, and produces of torque at 3200&nbsp;rpm.<br> In its PZEV version power output is reduced to and produces of torque.

Applications:

Applications:

See also

References