The 2021 RAM ProMaster City is available as a 4-door, 2-seat cargo van. Starting at $25,715, the 2021 RAM ProMaster City Cargo is powered by a 2.4LL , 4 -cylinder engine mated to an automatic transmission that returns an EPA estimated 21-mpg in the city and 28-mpg on the highway. The top of the line 2021RAMProMaster CitySLT Wagon , priced at $ 28,255 , is powered by a 2.4LL , 4 - cylinder engine mated to an automatic transmission that returns an EPA estimated 21-mpg in the city and 28-mpg on the highway.