BMW M3 and Audi RS5 [video]
The BMW M3 is powered by naturally aspirated hi-revving 4.0 liter V8 with 420PS (309 kW) at 8300RPM and 400Nm (300 lb-ft) at 3900RPM. It accelerates from 0 to 100 km/h in 4.6 seconds and the quarter mile is passed in 12.4 seconds with 114 mph.
The Audi RS5 is powered by 4.2 litter V8 with 450hp and 430Nm of torque at 6000RPM, so it is slightly overpowered compared to the M3. The acceleration of RS5 is the same - 0 to 100 km/h in 4.6 seconds.
However, BMW M3 is the better car at the race track and especially for fun and driving pleasure.