The 2018 Honda Ridgeline is available as a 4-door, 5-seat regular side. Starting at $29,730, the 2018 Honda Ridgeline RT FWD is powered by a 3.5L , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated 19-mpg in the city and 26-mpg on the highway. The top of the line 2018HondaRidgelineBlack Edition AWD , priced at $ 43,220 , is powered by a 3.5L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 18-mpg in the city and 25-mpg on the highway.