Powertrain, handling, ride, quietness, fuel economy, front-seat comfort, fit and finish, high-tech features.
Controls, turning circle.
The A6, our top-rated luxury sedan, is quick and effortless, thanks to the smooth and refined 3.0-liter supercharged V6, yet it returned a respectable 22 mpg overall in our tests. The base engine is a 2.0-liter turbo four-cylinder. The eight-speed automatic is super-smooth, but front-drive versions get a CVT. The A6 rides comfortably, and handling is agile and secure. The cabin is hushed, and the seats and interior quality are top-notch. Some controls are complicated. Standard features on 3.0T and higher trims include navigation with Google maps and a touchpad for inputting radio and navigation commands. First year reliability has been average. A 3.0-liter diesel V6 option arrives for 2014.