The 2017 Acura RLX is available as a 4-door, 5-seat sedan. Starting at $60,450, the 2017 Acura RLX w/Advance is powered by a 3.5L, 6-cylinder engine mated to an automatic transmission that returns an EPA estimated 20-mpg in the city and 30-mpg on the highway. The top of the line 2017 Acura RLX w/Technology, priced at $54,450, is powered by a 3.5L, 6-cylinder engine mated to an automatic transmission that returns an EPA estimated 20-mpg in the city and 30-mpg on the highway.