The 2012 Acura MDX is available as a 4-door, 7-seat sport utility. Starting at $43,030, the 2012 Acura MDX Base is powered by a 3.7L , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated 16-mpg in the city and 21-mpg on the highway. The top of the line 2012AcuraMDXAdvance Pkg w/Entertainment Pkg , priced at $ 54,555 , is powered by a 3.7L , 6 - cylinder engine that returns an EPA estimated 16-mpg in the city and 21-mpg on the highway.