Quick, nimble, and subtly handsome summarize the stunning S5 regardless of body style. All S5s combine Quattro all-wheel drive with precise steering, adept brakes, and sharp handling. The coupe and convertible use a 333-hp supercharged 3.0-liter V-6. A six-speed manual is standard in the coupe, but the convertible’s exclusive seven-speed automatic is optional. A four-door S5 Sportback extends an already roomy rear seat; it packs a 354-hp turbo 3.0-liter V-6 and an eight-speed automatic.