Fiat TwinAir engine
| TwinAir engine | |
|---|---|
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|
| Overview | |
| Manufacturer | Fiat Powertrain Technologies |
| Also called | SGE (Small Gasoline Engine) |
| Production | 2010–present |
| Combustion chamber | |
| Configuration | Straight-two |
| Displacement | 1.0 L (964 cc) (naturally aspirated) 0.9 L (875 cc) (turbocharged) |
| Cylinder bore | 83.5 mm (3.29 in) (naturally aspirated) 80.5 mm (3.17 in) (turbocharged) |
| Piston stroke | 88 mm (3.5 in) (naturally aspirated) 86 mm (3.4 in) (turbocharged) |
| Cylinder block alloy | Cast iron |
| Cylinder head alloy | Aluminium |
| Valvetrain | 8-valve, chain-driven single overhead camshaft, MultiAir |
| Compression ratio | 11.2:1 (naturally aspirated) 10.0:1 (turbocharged) |
| Combustion | |
| Turbocharger |
Naturally aspirated Single turbocharger |
| Fuel system | Indirect injection |
| Fuel type |
Gasoline Gasoline/CNG bifuel |
| Oil system | Wet sump |
| Cooling system | Water cooled |
| Output | |
| Power output | 60 PS (44 kW) (naturally aspirated) 80 PS (59 kW) (bifuel turbo) 85 PS (63 kW) or 105 PS (77 kW) (turbo) |
| Specific power | 62 PS/L (TwinAir 60) 97 PS/L (TwinAir 85) 120 PS/L (TwinAir 105) |
| Torque output | 88 N·m (65 ft·lb) at 3,500 rpm (naturally aspirated) 140 N·m (100 ft·lb) at 2,500 rpm (bifuel turbo) 145 N·m (107 ft·lb) at 2,000 rpm (turbo) |
| Chronology | |
| Predecessor | FIRE engine |
Fiat's TwinAir engine is an inline-two engine designed by Fiat Powertrain Technologies as part of its Small Gasoline Engine (SGE) family — employing Fiat’s Multiair hydraulically-actuated variable valve timing (VVT) 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 875cc TwinAir won Best Engine Under 1 Liter, Best New Engine, Best Green Engine and International Engine of the Year. 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.”
Fiat's TwinAir debuted at Internationale Automobil-Ausstellung 2007 in the Fiat Panda Aria concept car. as an 80 PS, turbocharged, CNG-hydrogen mix and gasoline bifuel unit.
The production TwinAir engine was launched at the 2010 Geneva Motor Show in 85 PS, turbocharged gasoline form and became available later in 2010 in the Fiat 500.
Later, it was launched also in other FCA vehicles such as the 2012 Punto. The naturally aspirated 1.0 L 60 PS version became available on the 2012 Fiat Panda and the 500 in select markets, and so two other turbocharged 0.9 L variants: the 80 PS CNG/petrol unit (on Panda, 500L and Ypsilon) and the 105 PS unit (on MiTo, 500L and 500).
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