The 2020 RAM ProMaster City is available as a 4-door, 2-seat cargo van. Starting at $24,480, the 2020 RAM ProMaster City Cargo is powered by a 2.4L , 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 2020RAMProMaster CitySLT Wagon , priced at $ 27,730 , is powered by a 2.4L , 4 - cylinder engine mated to an automatic transmission that returns an EPA estimated 21-mpg in the city and 28-mpg on the highway.