The Audi RS5 features a 4.2-litre naturally aspirated V8 with 444 hp at over 8,000 rpm and 320 lb·ft of torque. The now-discontinued B7 Audi RS4's 4.2 FSI V8 engine was based on and shared many parts with other 4.2 FSI V8 engines found in other Audi vehicles such as the new RS5.