The 2005 Mazda RX-8 is available as a 4-door, 4-seat coupe. Starting at $31,700, the 2005 Mazda RX-8 Shinka Special Edition (A4) is powered by a 1.3L, 0-cylinder engine mated to an automatic transmission that returns an EPA estimated 18-mpg in the city and 24-mpg on the highway. The top of the line 2005 Mazda RX-8 Shinka Special Edition (M6), priced at $32,470, is powered by a 1.3L, 0-cylinder engine mated to a manual transmission that returns an EPA estimated 18-mpg in the city and 24-mpg on the highway.