The engine of the RS5 is a 4.2 liter naturally aspirated V8 with 450HP (331 kW) and 430Nm (317 lb-ft) of torque. It is mated to a 7-speed S-tronic gearbox sending all that power to Quattro AWD system. 0-100 km/h in 4.9 seconds and a top speed of 250 km/h (155 mph) – electronically limited. However, upon request, Audi can increase it to 280 km/h (174 mph).