The 2009 Acura RDX is available as a 4-door, 5-seat sport utility. Starting at $33,895, the 2009 Acura RDX Base is powered by a 2.3L, 4-cylinder engine mated to an automatic transmission that returns an EPA estimated 17-mpg in the city and 22-mpg on the highway. The top of the line 2009 Acura RDX w/Technology Package, priced at $37,195, is powered by a 2.3L, 4-cylinder engine mated to an automatic transmission that returns an EPA estimated 17-mpg in the city and 22-mpg on the highway.