5.9L vs 6.7L

Cummins Comparison Chart

Cummins has provided three engines to Chrysler for use in their heavy duty Ram pickup line, the 5.9L 12v, the 5.9L 24v, and the 6.7L 24v. Though all three engines are based on the B series platform, their similarities vary considerably. Please enjoy this comparison between the engines that have been offered in Ram model pickups from 1989 to current.

 

 

Engine:

5.9L 12v Cummins (6BT)

5.9L Cummins ISB (24v)

6.7L Cummins ISB

Displacement:

359 cid, 5.9 liters

359 cid, 5.9 liters

408 cid, 6.7 liters

Bore x Stroke:

4.02 inches x 4.72 inches

4.02 inches x 4.72 inches

4.21 inches x 4.88 inches

Compression Ratio:

17.0:1

16.3:1, 17.2:1 (HO)

17.3:1

Injection:

Bosch VE injection pump (89-93), Bosch P7100 injection pump (94-98).

Electronically controlled Bosch VP44 injection pump, Bosch high pressure common rail system for 2003.

Electronically controlled Bosch high pressure common rail.

Aspiration:

Holset Turbocharger, intercooled 91 +

Holset Turbocharger, intercooled

Variable geometry turbocharger

Valvetrain:

12 valve (2v per cyl), solid lifter camshaft

24 valve (4v per cyl), solid lifter camshaft

24 valve (4v per cyl), solid lifter camshaft

Weight:

Approx. 1,100 lbs dry

Approx. 1,150 lbs dry

Approx. 1,150 lbs dry

Horsepower:

160 - 215 HP

235 - 325 HP

350 - 385 hp

Torque:

400 - 440 lb-ft

460 - 610 lb-ft

610 to 865 lb-ft