The 2015 RAM 1500 is available as a 2-door, 3-seat regular side. Starting at $25,660, the 2015 RAM 1500 Tradesman/Express 4x2 Regular Cab 6.5' Box is powered by a 3.6L , 6 -cylinder engine mated to an automatic transmission that returns an EPA estimated 17-mpg in the city and 25-mpg on the highway. The top of the line 2015RAM1500Rebel 4x4 Crew Cab 5.5' Box , priced at $ 44,720 , is powered by a 3.6L , 6 - cylinder engine mated to an automatic transmission that returns an EPA estimated 16-mpg in the city and 23-mpg on the highway.