you should hear one with a turbo or supercharger 
Supercharger = sounds like a wheel bearing has gone.

Turbo...nice!
I have a mate with a 3.0 low compression VR6 in a Golf Rallye, runing 500+ BHP and through VW Motorsport / Gemini 6 speed, semi straight-cut, close ratio gearkit...and that re-defines how quick you thought a Golf could be! Wild...