The 2014 McLaren MP4-12C is available as a 2-door, 2-seat coupe. Starting at $239,400, the 2014 McLaren MP4-12C Coupe is powered by a 3.8L , 8 -cylinder engine mated to an automatic transmission that returns an EPA estimated 15-mpg in the city and 22-mpg on the highway. The top of the line 2014McLarenMP4-12CSpider , priced at $ 265,750 , is powered by a 3.8L , 8 - cylinder engine mated to an automatic transmission that returns an EPA estimated 15-mpg in the city and 22-mpg on the highway.