(December 11, 2012) AUBURN HILLS, Mich. — Cummins Inc. has produced its 2-millionth diesel engine for Ram Trucks, highlighting the latest milestone in a storied partnership that spans four decades. The 350-horsepower, 6.7-liter, in-line 6-cylinder turbo diesel is distinguished by its “Cummins Red” rocker cover and breather. But despite its 800 pound-feet peak torque rating, the historic engine — feted Monday at a Cummins plant in Columbus, Ind. — will not see service. Instead, it will go on display, touring the U.S.

“The Ram Truck-Cummins diesel partnership is one of the industry’s most enduring and certainly fitting of such a tribute,” says Fred Diaz, president and CEO – Ram Truck. “Both companies have benefited greatly, but Ram diesel customers are the real beneficiaries. Every day they experience the toughness and capability a Cummins-powered Ram can deliver.”



Cummins began supplying engines to Chrysler Group in 1988. Today in North America, only Ram-brand pickups and chassis cabs feature the coveted Cummins “C” logo.

“I am immensely proud of our association with Cummins,” says Bob Lee, Chrysler Group vice president. “And I have no qualms matching our truck diesels against those of any competitor for performance and durability.”

The Chrysler Group-Cummins partnership traces its beginnings to 1985, when development work began on a 5.9-liter 12-valve in-line 6-cylinder turbo diesel. When it launched in 1989, it was rated at 160 horsepower and 400 lb.-ft. of peak torque – less than half the numbers for today’s High-Output 6.7-liter Cummins turbo diesel.

In the 2013 Ram Heavy Duty pickups, the top-line Cummins engine makes 385 horsepower and a best-in-class 850 lb. ft. of torque.

Among other notable events in the evolution of Cummins diesels produced for Chrysler Group:

    • 24-valve design introduced in model-year 1998.5
    • Adoption of high-pressure common-rail fuel delivery in 2003
    • Named to Ward’s 10 Best Engines list in 2004
    • Displacement increased to 6.7 liters from 5.9 liters in model-year 2007.5
    • Met 2010 EPA emissions certification in 2007

Take-rate is testament to the appeal of Cummins engines among Ram customers. Diesels account for nearly 80 percent of Ram Heavy Duty sales.