There's a good range of petrol engines, including a 2.0-litre turbocharged four-cylinder unit, a 2.8-litre V6, and a supercharged 3.0-litre. The V10-engined S6 is amazingly fast, but the more popular diesel units include two 2.0-litre units, plus a sweet 2.7 and a potent 3.0 V6. The A6 is a big car, and while you might think it needs a big engine to shift it, in fact our favourite is the more powerful of the two 2.0-litre TDI units. Its smooth, powerful, refined and economical.
Ride & Handling
Although the standard suspension offers a decent blend of comfort and control, it doesnt cope with as wide a range of road conditions as the more sophisticated, more expensive air-suspension. With air added to the reassurance of traction-boosting four-wheel-drive, youre getting close to the ultimate A6. With this set-up, the A6 changes direction sharply, resists roll and clings on well. In the S6, though, the ride is very firm, and the car is not as agile as you might expect.
Sporty the A6 may be, but refinement has not been overlooked; the car is remarkably hushed up to motorway speeds. The 3.0T is the smoothie of the bunch, but all the engines, other than the 2.0-litre diesel, are impressively quiet, although the S6's V10 sounds great when you give it its head. The automatic gearbox changes gear almost imperceptibly, and the manual is much better than the one offered in the BMW 5 series.