Performance, power and 0-100 km/h
2025 RAM 2500 Limited 6.7L Cummins has the quicker recorded 0-100 km/h time at 7.5 seconds, compared with 9.5 seconds for 2025 RAM ProMaster 3500 High Roof 159WB. 2025 RAM 2500 Limited 6.7L Cummins has the higher listed output at 370 hp; 2025 RAM ProMaster 3500 High Roof 159WB is rated at 276 hp, a difference of 94 hp. The torque figures follow 2025 RAM 2500 Limited 6.7L Cummins at 1,084 Nm and 2025 RAM ProMaster 3500 High Roof 159WB at 400 Nm. These figures describe straight-line potential only; they do not establish braking performance, ride quality, steering response or durability under repeated hard use.
Range, battery, charging and efficiency
Range and energy-use figures are either not shared by both cars or not directly comparable across these powertrain types.
Dimensions, cargo space and towing
2025 RAM 2500 Limited 6.7L Cummins carries the higher towing rating at 8,256 kg, while 2025 RAM ProMaster 3500 High Roof 159WB is listed at 2,540 kg. 2025 RAM 2500 Limited 6.7L Cummins is 75 mm longer overall. Exterior size is not a benefit by itself: a longer body may create useful room, but cargo shape, rear-seat space and ease of parking still require a physical inspection.
Price and overall assessment
2025 RAM ProMaster 3500 High Roof 159WB has the lower listed starting price at $44,855, compared with $74,470 for 2025 RAM 2500 Limited 6.7L Cummins. 2025 RAM 2500 Limited 6.7L Cummins leads in more of the shared headline fields, but that is not a universal verdict: a buyer should weight price, performance, range and utility rather than simply count category wins. The assessment is based on the specifications shown here; it is not presented as a two-car road test.