Most A6 models come with Audi's Quattro all-wheel-drive system giving them a major traction advantage over BMW and Mercedes models, most of which are rear-wheel drive. One of the most popular models, however, is the front-wheel-drive A6 3.0, which delivers a smooth ride, responsive performance, and a sumptuous interior. The A6 3.0 comes with Audi's latest V6 engine and its excellent CVT automatic, a smooth, responsive and efficient combination. It's fitted with traction control, anti-lock brakes, and Audi's superb safety engineering.

At the other end of the spectrum is the new high-performance RS 6 with lightning-fast passing performance from a 450-horsepower twin-turbo V8. Punch it and the RS 6 delivers world-class performance, 0 to 60 in less than 4.6 seconds, Autobahn stability at triple-digit velocities. Even more impressive: It motors around town with the smooth ride and easy demeanor of a refined luxury car.

In between is a host of models that are a joy to drive, including the sporty 2.7 T and the powerful 4.2. They all share crisp steering and finely honed handling. All come with beautifully finished and highly functional interiors. Avant wagons offer cargo capacity with sports sedan handling and a luxurious ride. There isn't a dog in the bunch, so choosing one comes down to personal preferences.