The 2015 Aston Martin V8 Vantage is available as a 2-door, 2-seat coupe. Starting at $123,695, the 2015 Aston Martin V8 Vantage Coupe is powered by a 4.7L , 8 -cylinder engine mated to a manual transmission that returns an EPA estimated 13-mpg in the city and 19-mpg on the highway. The top of the line 2015Aston MartinV8 VantageRoadster , priced at $ 138,195 , is powered by a 4.7L , 8 - cylinder engine mated to a manual transmission that returns an EPA estimated 13-mpg in the city and 19-mpg on the highway.