The 2008 Acura RL is available as a 4-door, 5-seat sedan. Starting at $46,280, the 2008 Acura RL Base is powered by a 3.5L , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated 16-mpg in the city and 24-mpg on the highway. The top of the line 2008AcuraRLHawaii Only , priced at $ 49,165 , is powered by a 3.5L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 16-mpg in the city and 24-mpg on the highway.