2017 Audi A5/S5: Available in either coupe or convertible variant, the two-door 2017 Audi A5 and its S5 performance sibling gain new available features for this year, including some exterior upgrades with the optional S Line package. The A5 and S5 compete with the Lexus RC, Mercedes-Benz C-Class, and BMW 3- and 4-Series.The A5 is powered by a 220-horsepower, 2.0-liter turbocharged four-cylinder engine that pairs with either a six-speed manual or eight-speed automatic transmission, while the S5 comes with a supercharged 3.0-liter V-6 that makes 333 horsepower and pairs to either a six-speed manual or seven-speed automatic. All versions are all-wheel drive. Fuel economy is rated at 23 mpg city and 32 mpg highway for the A5 (22/30 with the automatic transmission, 21/29 for the convertible with automatic transmission).Available safety, comfort, connectivity, and convenience features include premium audio, an auxiliary jack, an infotainment system, a navigation system, iPod integration, Bluetooth, satellite radio, front airbags, side curtain airbags, front-side airbags, knee airbags, stability control, traction control, and a rearview camera.Base price for the A5 is $41,200, excluding the $950 destination charge.