The 2011 Acura MDX is available as a 4-door, 7-seat sport utility. Starting at $42,930, the 2011 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 2011AcuraMDXAdvance Pkg w/Entertainment Pkg , priced at $ 54,455 , 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.