Cummins unveiled the new 2025 6.7-liter Turbo Diesel Pickup engine system for Ram Heavy Duty, Cummins’ most advanced diesel pickup engine yet. As part of this, Cummins and Stellantis have extended their partnership to supply Ram Brand through 2030.

New 2025 6.7L Cummins Turbo Diesel for Ram Heavy Duty Pickups.

Cummins’ 6.7-liter Turbo Diesel advanced engine system and powertrain will be offered in the recently announced 2025 Ram 2500, 3500 Heavy Duty Pickups and Ram 3500, 4500 and 5500 Chassis Cab trucks.

Cummins’ latest offering delivers enhanced performance alongside High-Output ratings of 430 horsepower and 1,075 lb.-ft. of torque for Pickups, and 360 horsepower and 800 lb.-ft. of torque for Chassis Cab. In close collaboration with Ram and their powertrain providers, the 2025 Cummins 6.7L Turbo Diesel engine is optimized with a brand-new 8-speed transmission.

All 2025 Ram Heavy Duty truck models powered by Cummins received noticeable gains in acceleration and power, driving home stronger overall truck performance and towing capability.

The Ram 2500 gained improvements in towing speeds and responsiveness, with faster 0-60 mph and quarter-mile times, especially when towing heavy loads. These enhancements promise drivers smoother transient responses and greater confidence under towing conditions. Noise, vibration and harshness were also improved using helical valve train synchronizing gears which enable a quieter ride.

The latest power offering for Pickups and Chassis Cab from Cummins includes advanced emissions air handling that also introduces a new airflow management design. This accompanies a new high-pressure fuel delivery system that offers top feed dry service injectors and a new fuel pump. Cummins’ newest variable-geometry turbocharger for the new 6.7-liter delivers intelligent condition-based power output that is now faster and more efficient.

Cummins has also introduced new features that make it easier to service the engine system and get back on the road. Software updates can now be executed from the comfort and convenience of inside the truck. In addition, the oil filter and dual fuel filter are now positioned to enable serviceability from the top side of the engine, improving the ease of maintenance—resulting in faster and less complex servicing for the 2025 Cummins 6.7-liter Turbo Diesel.

Additionally, the Cummins 6.7 Turbo Diesel Pickup and Chassis Cab engine systems offer significantly improved cold-start management with the integration of advanced glow plug technology. By reducing the wait to start time, this enhancement ensures reliable vehicle operation even in the harshest and most extreme weather conditions.

Built in Columbus, Indiana, the 6.7 Turbo Diesel has evolved from the first generation 5.9-liter, 160-horsepower to today’s 6.7-liter engine up to 430 horsepower.