Cummins Inc., in collaboration with Ram, has introduced its next-generation 6.7-liter Turbo Diesel engine system for the 2025 Ram Heavy Duty truck lineup. The announcement was made during the launch event, highlighting extended cooperation between Cummins and Stellantis, ensuring supply to the Ram brand through 2030.
The 2025 Ram Heavy Duty series, including the Ram 2500, 3500, and Chassis Cab models, will feature the upgraded engine system. Boasting improved power and efficiency, the engine offers up to 430 horsepower and 1,075 lb.-ft. of torque for pickups and 360 horsepower with 800 lb.-ft. of torque for Chassis Cab models. Coupled with a new 8-speed transmission, the engine promises enhanced towing capabilities, faster acceleration, and smoother performance under load.
Designed for durability and reliability, the advanced 6.7L engine integrates cutting-edge technologies such as an intelligent variable-geometry turbocharger, improved cold-start glow plug systems, and upgraded emissions management. A new high-pressure fuel delivery system with top-feed injectors and an innovative airflow design enhances performance and serviceability. Maintenance is now more convenient, with features like top-access oil and fuel filters and remote software updates.
Cummins’ partnership with Ram, which began in 1989, has set benchmarks in diesel engine innovation. The 6.7L Turbo Diesel engine continues this legacy, evolving from its earlier 5.9L version to meet modern performance and sustainability standards. Built in Columbus, Indiana, the engine reflects Cummins’ commitment to power solutions that align with their “Destination Zero” strategy, aiming for sustainable and efficient energy solutions.
Cummins, a global leader in power systems, employs over 75,000 people worldwide and offers a diverse portfolio of products, including diesel, natural gas, electric, and hydrogen-powered systems. With $34.1 billion in sales for 2023, the company remains focused on delivering innovative solutions that drive prosperity and environmental stewardship.
