The 2010 Acura RL is available as a 4-door, 5-seat sedan. Starting at $54,250, the 2010 Acura RL w/CMBS 50 State 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 22-mpg on the highway. The top of the line 2010AcuraRLHawaii Only , priced at $ 50,450 , 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 22-mpg on the highway.