Cummins’ venerable 5.9-liter diesel engine has undergone many revisions. Here are some highlights of each one. What is a 5.9-liter Cummins diesel engine? Well, for hardcore enthusiasts ...

The first Cummins Turbo Diesel was used in the 1989 Dodge Ram, with projected sales of less than 5,000 engines. Actual sales exceeded 20,000 engines in the first year, signaling to the market that a ...