The A8’s blend of performance, comfort and serenity are wedded to a beautifully built, practical and well-equipped interior. In fact, by a whisker, it beats the Mercedes S Class, which shows just how good to drive and be driven the Audi A8 isget the best price
Engine: L 50 TDI Quattro
This 3.0-litre V6 diesel is smooth and quiet, if not quite as refined as the 400d engine in the rival Mercedes S Class. It isn't as powerful as that engine, either, although performance is more than adequate and there's a healthy swell of acceleration available from low revs.