We have been waiting patiently to see what power will lie beneath the Audi RS5 and RS4. The wait is over. Sources have confirmed that they will be using a V8 engine to power the cars.
The Audi RS4 will use the 4.2-liter FSI V8. This powerful engine will also be mated to the RS5. The 4.2-liter FSI V8 will feature Audiâ€™s Valvelift system and to produce close to 450 bhp. Right now both of these cars are testing in Germany and the U.S..