The Audi A6 is a quiet, practical, and efficient luxury car. With the supercharged V-6 under the hood, it’s a sleeper sedan capable of sports-car-like acceleration. This a 252-hp turbocharged 2.0-liter four-cylinder. Front-wheel drive and a seven-speed automatic are standard with the four-cylinder, and Audi’s Quattro all-wheel-drive system is available as an option, paired with an eight-speed automatic. All V-6–powered models come with all-wheel drive and the eight-speed automatic transmission. Sport suspension, once available only with the supercharged V-6, is now available with the turbocharged 2.0-liter inline-four via the new Sport trim level. The A6 is a quietly athletic car. Its suspension keeps body roll in check easily in high-speed corners, but its steering wheel broadcasts precious little information from the front wheels. Still, the A6, especially with Quattro all-wheel drive, is predictable and easy to drive quickly on twisty stretches of road.