The 2018 Audi A3 e-tron is a plug-in hybrid, sportback variant of the compact A3. It is powered by a 204-hp, turbocharged 1.4-liter 4-cylinder engine and an electric motor mated to a 6-speed dual-clutch automatic transmission and front-wheel drive. Fuel efficiency for the A3 e-tron is an EPA-estimated combined 83 mpg-e.