Three four-cylinder engines with turbocharging and direct fuel injection are available for both the TT Coupe and the TT Roadster. The two TFSI gasoline engines and the TDI combine sporty performance with groundbreaking efficiency – their fuel consumption figures have been reduced by up to 14 percent. All three engines are coupled with a recuperation system that recovers energy during braking and coasting phases.

New to the lineup is the 2.0 TFSI with 155 kW (211 hp), which replaces the 2.0 TFSI with 147 kW (200 hp) and the 3.2 FSI. With a manual transmission, the two-liter engine accelerates the Coupe from zero to 100 km/h (62.14 mph) in 6.1 seconds on its way to a top speed of 245 km/h (152.24 mph). Audi also offers the 2.0 TFSI with an optional drivetrain featuring the six-speed S tronic and quattro permanent all-wheel drive. The spring from zero to 100 km/h (62.14 mph) takes only 5.6 s in this configuration.

The Audi valvelift system AVS in the new 2.0 TFSI increases power, torque and efficiency. Equipped with a manual transmission, the TT 2.0 TFSI consumes only 6.6 liters of fuel per 100 km (35.64 US mpg) in the European test cycle. CO2 emissions are an exemplary 154 grams/km (247.84 g/mile). The best value posted by a competitor is 199 g/km (320.26 g/mile). Fuel consumption has improved by 1.1 liters/100 km over the previous model.

The 2.0 TFSI is a winner par excellence, having been named “Engine of the Year” five years in a row by an international jury. Its technology package combines high output with impressive pulling power. A constant 350 Nm (258.15 lb-ft) of torque are available between 1,600 and 4,200 rpm. The long-stroke engine, which is extremely cultivated thanks to two balance shafts, has been painstakingly optimized for minimal friction.

The Audi valvelift system adjusts the lift of the exhaust valves in two stages depending on need. This reduces flushing losses in the combustion chamber and also ensures that the optimal flow of the exhaust gas is directed to the turbocharger, which in turn ensures that torque is developed quickly.

The combination of turbocharging and direct fuel injection also reduces the combustion chamber temperatures and the resulting tendency to knock. This allows a high compression ratio of 9.6:1, which improves efficiency.

The TT engine lineup includes two other four-cylinder engines besides the new 2.0 TFSI. The 1.8 TFSI, available with a six-speed manual transmission and front-wheel drive, delivers 118 kW (160 hp) and 250 Nm of torque (184.39 lb-ft), the latter between 1,500 and 4,500 rpm. It launches the Coupe from a standing start to 100 km/h in 7.2 seconds, with a top speed of 226 km/h (140.43 mph). It consumes just 6.4 liters of fuel per 100 km (36.75 US mpg) on average, which corresponds to only 149 grams of CO2/km (239.79 g/mile). The TT 2.0 TDI remains the only sports car with a diesel engine in its segment, and its efficiency clearly sets the standard. The TT Coupe consumes just 5.3 liters of fuel per 100 km (44.38 US mpg), which corresponds to only 139 grams of CO2/km (223.70 g/mile). With 125 kW (170 hp) and 350 Nm (258.15 lb-ft) of torque – the latter available between 1,750 and 2,500 rpm – the standard sprint takes 7.5 seconds and acceleration continues until a top speed of 226 km/h (140.43 mph) is reached. The two-liter TDI is mated to a manual transmission and quattro all-wheel drive.

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