I was referring to the tickover sound. Where did i say a 500bhp V10 BMW was slow?????? Yes you have to rev it to get it going, the Audi produces all its torque from 1950rpm - 5600rpm The 0-60 times are the same despite 57 less bhp, i would guess the M5 would be quicker top end due to the 4x4 tranny....but when i chip mine i would assume it would be quicker overall bar top speed.

Carlo, the M5 is a staggering car but if i dont keep it, there is a reason. The reasons were:
Dreadful fuel consumption, even pottering about
Dreadful gearbox when driving slow

Other than that lovely piece of enginneering.