4.2L V-6 and 5.6L V-8 Cummins Concept Engines

4.2L & 5.6L Cummins Concepts

The original Ram 1500 diesel did not feature the current EcoDiesel - late in 2007, Dodge (now Ram Trucks) teamed with Cummins to introduce two diesel options to the 1/2 ton category. At the time, competitors Ford Motor Company and General Motors had shown similar interests and the race to bring a diesel engine option to the 1/2 ton marketplace began. The battle between the Big 3 was short lived and as the economic crisis began to brew, Chrysler's plans quickly changed. This was not, however, before Cummins gave us a preview of a 4.2L V-6 and 5.6L V-8 that the company was developing. The engines have failed to resurface and plans for these engines are unlikely to reach the company's portfolio.

4.2L Cummins Diesel V-6

Configuration:	90-degree V-6
Displacement:	4.2 liters, 256 cubic inches
Head Material:	Aluminum cylinder heads
Block Material:	Cast iron engine block
Bore:	3.70 in x 3.94 in
Turbocharger:	Variable geometry turbocharger (VGT)
Fuel System:	Direct injection, high pressure common rail
Engine Weight:	663 lbs
Horsepower:	270 hp @ 3,800 RPM (estimated)
Torque:	420 lb-ft. @ 1,700 RPM (estimated)
Intended Applications:	1/2 ton Dodge Ram 1500, Dodge Durango
Fuel Mileage (est):	22.1 mpg combined city & highway driving (44% improvement). 25 mpg highway, 20.3 mpg city
Valvetrain:	Single overhead cam (SOHC) 24-valve

5.6L Cummins Diesel V-8

Configuration:	90 degree V-8
Displacement:	5.6 liters, 342 cubic inches
Head Material:	Aluminum cylinder heads
Block Material:	Cast iron engine block
Bore x Stroke:	3.70 in x 3.94 in
Turbocharger:	Single variable geometry turbocharger (VGT)
Fuel System:	High pressure common rail
Engine Weight:	788 lbs (approx)
Horsepower:	325 hp @ 4,000 RPM (estimated)
Torque:	500 lb-ft. @ 2,000 RPM (estimated)
Intended Applications:	1/2 ton Dodge Ram 1500, Dodge Durango, possible baseline engine for 2500 & 3500 Ram
Fuel Mileage (est):	24.6 mpg highway, 19.8 mpg city (49% improvement), 21.7 mpg combined.
Valvetrain:	Single overheard cam (SOHC), 32 valve

5.6L Cummins V-8 horsepower and torque curves — 5.6L Cummins V-8 horsepower & torque curves.
Note that this is a prototype engine and never reached the production phase.