What Car? says...
The Audi RS4 Avant is a very quick estate – a curiously appealing car category, but one without very many entrants. Indeed, until BMW makes an M3 Touring (which it probably won’t) or Alfa Romeo designs an estate version of the Giulia Quadrifoglio, the RS4 Avant has only one direct rival: the Mercedes-AMG C63 Estate.
However, don’t think for one second that Audi has let its guard down due to a lack of competition. Oh no. With a 2.9-litre turbocharged V6 under the bonnet, the RS4 Avant certainly has the firepower to back up its looks. Speaking of which, it’s a pretty discreet package considering. As it flicks by in a flash, observant bystanders will be able tell it apart from a regular Audi A4 Avant, though, by its bulging wheel arches, which it needs in order to house its massive alloy wheels. It also wears distinctive front and rear bumpers, and it all adds up to an undeniably purposeful presence.