The 2011 Acura RDX is available as a 4-door, 5-seat sport utility. Starting at $34,895, the 2011 Acura RDX AWD 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 2011AcuraRDXw/Technology Package FWD , priced at $ 35,995 , is powered by a 2.3L , 4 - cylinder engine mated to an automatic transmission that returns an EPA estimated 19-mpg in the city and 24-mpg on the highway.