Audi's A6 has a comfortable ride and agile handling, strong performance, great seats, and excellent fit and finish. It's one of our highest ranked sedans and is a perfect long-distance cruiser with a whisper quiet, roomy cabin. The 2.0-liter turbo four-cylinder works well but has a raspy, less-than-luxurious engine sound. The 3.0-liter supercharged V6 we tested is smooth and punchy, and returned a commendable 22 mpg overall. The front seats are comfortable and supportive, and the rear seat is roomy for three adults. An added plus is the large trunk. Although the infotainment system's center controller and screen take some getting used to, the system ultimately proves logical.