Though they're dwindling in popularity, coupes and convertibles remain appealing choices with luxury car buyers. Most of the ones wearing Audi's quad-ring logo on their grilles have an A5 badge on the back. Also, in addition to a 2-door coupe and a 2-door convertible, the Audi A5 lineup is available in a 5-door Sportback body style with a rear hatch, a large trunk, and folding seats to offer some of the utility of an SUV. Audi calls the sport-tuned versions the S5, while the RS 5 models provide serious performance. Every Audi A5 includes the company's Quattro all-wheel drive as standard equipment.