The 2005 Acura MDX is available as a 4-door, 7-seat sport utility. Starting at $36,900, the 2005 Acura MDX Base is powered by a 3.5L, 6-cylinder engine mated to anautomatic transmission that returns an EPA estimated 17-mpg in the city and 23-mpg on the highway. The top of the line 2005 Acura MDX w/Touring/RES/Navigation, priced at $43,975, is powered by a 3.5L, 6-cylinder engine mated to anautomatic transmission that returns an EPA estimated 17-mpg in the city and 23-mpg on the highway.