2017 Audi A8: The 2017 Audi A8 is a full-size luxury sedan that competes with the BMW 7-Series, Lexus LS, and Mercedes-Benz S-Class. For 2017, it simplifies its engine options and eliminates the short-wheelbase model.There are two available engines - a 3.0-liter supercharged V6 that makes 333 horsepower and a twin-turbocharged V8 that makes 450 horsepower. All A8s are now all-wheel drive. The smaller engine has EPA-estimated fuel-economy numbers of 19 mpg city/29 mpg highway, while the larger engine is listed at 18/29.Available features include sunroof, leather seats, heated front seats, infotainment, navigation, premium audio, satellite radio, Bluetooth, and four-zone climate control.Available safety features include stability control, traction control, lane-keep assist, rear-view camera, and dual-front, front-side, front-knee and side-curtain airbags.The 2017 Audi A8 has a base price of $82,500, not including dealer and destination fees.