The 2016 RAM 2500 is available as a 2-door, 3-seat regular side. Starting at $31,780, the 2016 RAM 2500 Tradesman 4x2 Regular Cab HD is powered by a 5.7L , 8 -cylinder engine that returns an EPA estimated The top of the line 2016RAM2500Longhorn 4x4 Mega Cab HD , priced at $ 57,285 , is powered by a 5.7L , 8 - cylinder engine that returns an EPA estimated