To that end, Audi has just announced its ... which is now available for A6 Saloon and Avant and A7 Sportback models. The new twin-turbo V6 is notable not only for being the most powerful six ...

The five-seat Audi A6 is a mid-size luxury sedan that comes ... while the super-performance RS 6 Avant wagon employs a twin-turbo 4.0-liter V-8 that delivers a whopping 621 hp.

The five-seat A6 is a mid-size luxury sedan ... the S6 is fitted with a 444-hp, turbo 2.9-liter V-6, while the performance RS 6 Avant wagon employs a twin-turbo 4.0-liter V-8 that delivers a ...

Audi’s lineup is going through a bit of a revamp right now, and the most exciting Audi Sport–developed RS versions of the mid-sized A6 and A7 ... uses a twin-turbo V8, the C6 gen got a ...