or a powerplant that had the performance characteristics of a big-rig's engine: a 5.9-liter Cummins diesel. With the engines installed in Dodge Ram rigs, sales went through the roof. Coupled with ...

The first RAM with a Cummins ... of engines, the 5.9-liter inline-six-cylinder diesel. Another change was a switch to 24-valves over the previous 12-valve setup which enhanced performance.

Cummins has put together an upgraded version of its 6.7-liter engine turbo diesel for RAM trucks - here's how much power this ...

Diesel engines are common in pickup trucks, like the Cummins 6.7- and 5.9-liter engines ... Let's see how they compare in terms of performance specs, known issues, and expected lifespan.