2018 Audi A5: Available in either coupe or convertible form, the A5 and its sporty companion, the S5, are redesigned for the 2018 model year. In addition to new styling, powertrains, and features, Audi has added a Sportback five-door coupe to the lineup. The A5, S5, and Sportback are midsize luxury cars that compete with BMW 4-Series, Cadillac ATS coupe, Lexus RC, and Mercedes-Benz C-Class.The A5 is powered by a 252-horsepower, 2.0-liter turbocharged four-cylinder engine that pairs with either a six-speed manual or seven-speed automatic transmission, while the S5 comes with a turbocharged 3.0-liter V6 that makes 354 horsepower and pairs to an eight-speed automatic. The Sportback is only available with the 3.0-liter engine. All versions will offer all-wheel drive.Available features include an infotainment system, premium audio, navigation system, iPod integration, Bluetooth, satellite radio, head-up display, Apple CarPlay, and Android Auto. Available safety features include pre-collision warning, rear cross-traffic warning, blind-spot monitoring, and traffic sign recognition.The A5, S5, and Sportback are set to arrive in Audi dealerships this spring.