The 2015 Audi A7 is available as a 4-door, 5-seat hatchback. Starting at $65,900, the 2015 Audi A7 3.0T is powered by a 3.0L , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated 18-mpg in the city and 28-mpg on the highway. The top of the line 2015AudiA73.0 TDI , priced at $ 68,300 , is powered by a 3.0L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 24-mpg in the city and 38-mpg on the highway.