The 2021 Honda Ridgeline is available as a 4-door, 5-seat regular side. Starting at $36,490, the 2021 Honda Ridgeline Sport is powered by a 3.5LL , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated 18-mpg in the city and 24-mpg on the highway. The top of the line 2021HondaRidgelineBlack Edition , priced at $ 43,920 , is powered by a 3.5LL , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 18-mpg in the city and 24-mpg on the highway.