2019 Audi A8 - Audi is introducing a new alpha-numeric designation with the A8. This is meant to provide an equivalency between the power outputs of it’s conventional engines and the forthcoming hybrid-electric or fully electric powerplants. As such, the A8 55 TFSI is powered by a 3.0 liter turbocharged V6 developing 340 horsepower and 368 pounds-feet of torque.