Power comes from a 4.2-liter V8 that produces 331 kW (444 hp / 450 PS) and 430 Nm (317 lb-ft) of torque. It is connected to a seven-speed S tronic transmission which allows the 1725 kilogram (3803 pound) coupe to accelerate from 0-100 km/h in 4.6 seconds, before topping out at an electronically limited 250 km/h (155 mph). If that isn't fast enough, Audi can remove the speed limiter to enable the car to hit 280 km/h (174 mph). Despite this immense performance, the RS5 only consumes 10.8 liters of petrol per 100 km (21.78 US mpg). Compared to the 354 hp 4.2-liter V8 in the S5 (which will soon be replaced by a supercharged 3.0-liter V6), the RS5 engine features friction reduction technology, "intensive fine-tuning of the dual-branch intake", and a new exhaust system.