RS5 has a 4.2-liter V8 engine with 450 HP (331 kW) and 430 Nm (317 lb-ft) of torque. It is connected to a 7-speed S tronic transmission and a quattro all-wheel drive system which enables the coupe to accelerate from 0-100 km/h in 4.6 seconds and hit an electronically-limited top speed of 250 km/h (155 mph).