The A4 is one of the most popular cars in the Audi lineup, namely for its attractive price tag, compact style and robust luxury features. Base models come with 17” alloy wheels, automated xenon headlamps, collision mitigation system, powered sunroof, leather upholstery, heated/powered front seating, triple-zone climate control, 7” touchscreen, Bluetooth/smartphone/USB integration and 10-speaker audio system. Upgrades can add features like larger wheels, folding side mirrors, 19-speaker Bang & Olufsen audio system, front/rear parking sensors, rolling Wi-Fi, GPS, 8.3” touchscreen, 360-degree parking camera, and more. The A4 comes with a turbocharged 2.0-liter four-cylinder engine that makes 252 horsepower and 273 pound-feet of torque.