Which used Audi A6 estate should I buy?
We'd buy either of the 2.5 V6 turbodiesels - so much pull always on tap, yet miserly with fuel. They came with an optional automatic gearbox, and it's worth finding one, because it works so well with the 2.5's broad-shouldered pull.
The many petrol V6s are also refined and strong but can't match our favourite diesels for fuel efficiency. The 2.0 and 1.8T turbo four-cylinder petrol engines are okay, but not strong enough for towing.