Performance, power and 0-100 km/h
2025 RAM ProMaster 3500 High Roof 159WB has the quicker recorded 0-100 km/h time at 9.5 seconds, compared with 10.4 seconds for 2024 Mercedes-Benz B-Class B 180 d. 2025 RAM ProMaster 3500 High Roof 159WB has the higher listed output at 276 hp; 2024 Mercedes-Benz B-Class B 180 d is rated at 116 hp, a difference of 160 hp. The torque figures follow 2025 RAM ProMaster 3500 High Roof 159WB at 400 Nm and 2024 Mercedes-Benz B-Class B 180 d at 260 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
2024 Mercedes-Benz B-Class B 180 d has the lower recorded consumption at 5.0 L/100km; 2025 RAM ProMaster 3500 High Roof 159WB is listed at 12.8 L/100km. Test cycle, temperature, wheel size and charging conditions can materially affect these results, so only figures measured on the same basis should be treated as directly comparable.
Dimensions, cargo space and towing
2025 RAM ProMaster 3500 High Roof 159WB provides the larger quoted cargo volume: 10,620 litres versus 455 litres, a difference of 10,165 litres. 2025 RAM ProMaster 3500 High Roof 159WB is 1,575 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
2024 Mercedes-Benz B-Class B 180 d has the lower listed starting price at $36,900, compared with $44,855 for 2025 RAM ProMaster 3500 High Roof 159WB. 2025 RAM ProMaster 3500 High Roof 159WB 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.