Audi S2s, S4s, RS4s, S6s and RS6s are fast enough in the first place. Their engines and chassis' are able to cope with plenty of tuning and extra horsepower.
And because of that they do lend themselves to insanely powerful conversions. With Audi's Quattro system they just shoot off the line with only the smallest amount of wheelspin - even with 1092BHP.
Here's our favourite videos of souped up Audis.