The power delivery of the 6.7-liter engine is smooth and progressive, and the cabin is never filled with any objectionable noise, even at full throttle. Like the best modern diesels, the Cummins doesn't wear its diesel heart on its sleeve, and that's a compliment. There is scarcely a trace of diesel clatter evident, provided you don't open the door when the engine is idling., , Despite its earth-friendly nature, the output of the Cummins diesel doesn't play second fiddle (or third) to its heavy-duty competition. Churning out 350 horsepower at 3,013 rpm and 650 pound-feet of torque at 1,500 rpm, the Ram's oil burner generates 25 hp and 40 lb-ft more than its predecessor. , , One owner and a clean Carfax priced well below book value this ia a very hard truck to find.