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Fiat TwinAir engine information


TwinAir engine
Overview
ManufacturerFiat Powertrain Technologies (2010-2011)
Fiat Group Automobiles (2011-2014)
FCA Italy (2014-)
Also calledSGE (Small Gasoline Engine)
Production2010–present
Layout
ConfigurationStraight-two
Displacement1.0 L (964 cc) (naturally aspirated)
0.9 L (875 cc) (turbocharged)
Cylinder bore83.5 mm (3.29 in) (naturally aspirated)
80.5 mm (3.17 in) (turbocharged)
Piston stroke88 mm (3.5 in) (naturally aspirated)
86 mm (3.4 in) (turbocharged)
Cylinder block materialCast iron
Cylinder head materialAluminium
Valvetrain8-valve, chain-driven SOHC, MultiAir
Compression ratio11.2:1 (naturally aspirated)
10.0:1 (turbocharged)
Combustion
TurbochargerSingle (in some versions)
Fuel systemIndirect injection
Fuel typeGasoline/CNG, bifuel
Oil systemWet sump
Cooling systemWater-cooled
Output
Power output60 PS (44 kW) (naturally aspirated)
80 PS (59 kW) (bifuel turbo)
85 PS (63 kW) or 105 PS (77 kW) (turbo)
Specific power62 PS/L (TwinAir 60)
97 PS/L (TwinAir 85)
120 PS/L (TwinAir 105)
Torque output88 N⋅m (65 lb⋅ft) at 3,500 rpm (naturally aspirated)
140 N⋅m (103 lb⋅ft) at 2,500 rpm (bifuel turbo)
145 N⋅m (107 lb⋅ft) at 2,000 rpm (turbo)
Chronology
PredecessorFIRE engine
SuccessorFiat Global Small Engine

Fiat's TwinAir engine is a Straight-twin engine designed by Fiat Powertrain Technologies as part of its Small Gasoline Engine (SGE) family — employing Fiat’s MultiAir hydraulically actuated variable valve timing and lift technology.

Offered in a variety of FCA vehicles in turbocharged and naturally aspirated variants, the engine is noted for its reduced size, weight, fuel consumption and CO2 emissions.

In the 2011 International Engine of the Year awards, the 875 cc (53.4 cu in) TwinAir won Best Engine Under 1 Litre, Best New Engine, Best Green Engine and International Engine of the Year. [1] Dean Slavnich, editor of Engine Technology International and co-chairman of the International Engine of the Year Awards, called the TwinAir one of the "all-time great engines.”[2]

  1. ^ "Fiat 875cc TwinAir". ukipme.com. Archived from the original on 2013-02-05. Retrieved 2012-01-03.
  2. ^ "Fiat's 0.9-Liter TwinAir Scoops the "International Engine of the Year 2011" Award". Carscoops. May 18, 2011.

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