The 2019 Audi A8 is available as a 4-door, 5-seat sedan. Starting at $83,800, the 2019 Audi A8 55 is powered by a 3.0L , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated 19-mpg in the city and 27-mpg on the highway. The top of the line 2019AudiA860 , priced at $ 96,800 , is powered by a 4.0L , 8 - cylinder engine mated to an automatic transmission that returns an EPA estimated 15-mpg in the city and 23-mpg on the highway.