The 2005 Aston Martin Vanquish is available as a 2-door, 2-seat coupe. Starting at $234,260, the 2005 Aston Martin Vanquish V12 is powered by a 6.0L , 12 -cylinder engine mated to an automatic transmission that returns an EPA estimated The top of the line 2005Aston MartinVanquishS , priced at $ 255,000 , is powered by a 6.0L , 12 - cylinder engine mated to an automatic transmission that returns an EPA estimated 11-mpg in the city and 17-mpg on the highway.