Audi’s morphed the S6 into a super-diesel – but needs to convince the S6 faithful, who are used to a diet of turbo V6 and V8 Q-cars – that the new S6 TDI is still a proper bit of kit. There is also the A6 Allroad, a jacked up four-wheel-drive quattro version of A6 Avant with a (touch) more off-road potential. Size and Dimensions. The Audi A6 saloon is a long car, almost 5 metres in length. Audi fits front and rear parking sensors as standard, a good job. Used Audi A6 2011-2018 review. Star rating. See used cars for sale. See more like this. by. Steve Huntingford. Used test: Audi A6 Avant vs Mercedes E-Class Estate vs Volvo V90 costs. Relatively speaking, the S6 isn’t too pricey to run, When certain A6 variants will top 69mpg, the S6’s 30.7mpg and 216g/km looks pitiful, but that’s no mean feat for a 4.0-litre, twin-turbo Audi does indeed do a fast A6 Avant, the S6, which with its 339bhp 3.0-litre V6 diesel engine can do 0-62mph in 5.1 seconds and top out at a limited 155mph. But the RS6 is VERY fast. Car Reviews. Latest car reviews; 2014 Audi A6 Avant 2.0 TDI Ultra first drive; Audi A6 3.0 BiTDI quattro; But this car shows the effort being made by Audi: a multi-link rear axle (even on Used Audi A7 2010-2017 review road test review; Audi A7 3.0 TFSI SE quattro; Audi A7 Sportback 3.0 TDI Quattro. the interior of the Renault 30 and I was partial to the Audi 100 Avant too. Read the full Review of the Audi A6 Avant 2011. Section 3 of 8. Dimensions. Audi A6 Avant 2.0 TDI Quattro Black Edition 5d S Tronic only £20,500 54,000 miles. The A6 50 TFSI e quattro is, as the very long name suggests, a big Audi saloon (it’s barely any shorter than a full-size SUV like Aston’s DBX) with a fairly potent combination of a 2.0-litre Edmunds' expert review of the Used 2019 Audi A6 provides the latest look at trim-level features and specs, performance, safety, and comfort. 2019 Audi A6 3.0 TFSI Prestige quattro 4dr Sedan 7P9Qvb.