You've got to hand it to Audi for not being afraid to tackle the opposition head-on. As BMW has become cheekier and cheekier with its 3-Series-based M3, so too has Audi's A4-based RS4 hottie become ...

To the average Joe, the Audi RS4 goes unnoticed. It looks like an ordinary A4, with the exception of a few sportier accents and different badges. But Matthew Collins has built an example that deserves ...