The 4.2-litre V8 is one of the great road car engines of the moment. At 1500rpm in sixth gear there is real urge on offer, yet it sounds and feels sensational at high revs in low gears and delivers the sort of thump only supercar drivers will have been familiar with. Its very best work occurs from 5000rpm upwards: the cam phasing changes slightly, the exhaust note hardens and the acceleration crystallizes into one final burst towards the cut-out…An M3 cannot compete with the RS4’s relentless wave of low- and mid-range flexibility, even if it is marginally more explosive over the final few revs before the limiter. – Autocar
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on Wednesday, March 22nd, 2006 at 11:25 am and is filed under Audi.