2027 Ram 2500 First Drive: Cummins Diesel Transforms the Power Wagon

Ram’s Power Wagon has always been a trail-focused brute, but its gasoline heart left it wanting when loaded down. For 2027, the brand finally drops the Cummins turbo-diesel into the 2500 lineup, and the difference is night and day. According to Edmunds’ testing, the oil-burner delivers the kind of low-end twist that makes towing and hauling feel effortless, all while preserving the truck’s rugged off-road hardware.

Edmunds notes that the diesel’s torque curve pairs perfectly with the Power Wagon’s limited-slip diffs and disconnecting sway bar, though the added front-end weight does blunt steering feel slightly. Still, for buyers who need a workhorse that can also crawl trails, this is the configuration they’ve been asking for.

Fuel economy remains a mixed bag, as expected for a heavy-duty diesel, but the trade-off is a substantial bump in capability. The 2027 Ram 2500 with the Cummins isn’t just a powertrain swap; it’s the version that finally makes the Power Wagon a true dual-threat.