Cummins launches next generation 6.7 L turbo diesel pickup engine system for 2025 Ram heavy duty trucks

9 January 2025

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

Cummins’ 6.7-liter Turbo Diesel 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.

“We’ve improved the power, efficiency, serviceability and driveability of our latest 6.7L Turbo Diesel engine, making the 2025 Ram Heavy Duty lineup the most desirable yet,” said Jane Beaman, Vice President—Global On-Highway and Pickup at Cummins.

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, to improve overall truck performance and towing capability.

The latest power offering for Pickups and Chassis Cab from Cummins introduces a new airflow management design with a new intake manifold with improved flow, improved head intake/exhaust port flow and larger intake/exhaust valves. Cummins’ newest variable-geometry turbocharger for the new 6.7-liter delivers intelligent condition-based power output that is now faster and more efficient. A new high-pressure fuel delivery system offers top feed dry service injectors and a new fuel pump. Other features include a redesigned block with improved cooling and pressure capability and robust heavy-duty pistons. The Pickup engine uses a close coupled catalyst.

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 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.

Additionally, the Cummins 6.7 Turbo Diesel Pickup and Chassis Cab engine systems offer improved cold-start management with the integration of glow plug technology.

Source: Stellantis | Cummins