Audi RS4 Avant returns.

To Audi’s quattro GmbH hotshop, the humble wagon has always been a good place to cram all of its go-fast bits and pieces, and it’s been a surprise that it has left the A4 Avant alone for so long.  That’s about to change, though, with quattro bringing back the RS4 nameplate, with huge acceleration and the promise of ferocious grip, in the third quarter of the year. At least, in Europe...