The 2010 Mazda RX-8 is available as a 4-door, 4-seat coupe. Starting at $32,110, the 2010 Mazda RX-8 Grand Touring (M6) is powered by a 1.3L , 0 -cylinder engine mated to a manual transmission that returns an EPA estimated 16-mpg in the city and 22-mpg on the highway. The top of the line 2010MazdaRX-8Grand Touring (A6) , priced at $ 32,810 , is powered by a 1.3L , 0 - cylinder engine mated to an automatic transmission that returns an EPA estimated 16-mpg in the city and 23-mpg on the highway.