4.2L & 5.6L Cummins

Cummins V6 & V8 Concepts

Before the economy took a turn for the worse in 2007, Cummins had been developing a V-6 and V-8 engine platform that would have been an ideal fit for the Dodge Ram 1500. At the time, Cummins and Dodge were racing to compete with General Motor's 4.5L turbodiesel and Ford's "Lion" V-6 and V-8 engines, all of which were also scheduled for 1/2 ton applications. There were also rumors that the 5.6L V-8 Cummins could become available in the Ram 2500 and 3500, possibly even as a standard engine. Unfortunately, Cummins/Chrysler had to drop the campaign before their visions ever became a reality, as did the other domestic automakers. The interest in a Cummins powered 1/2 ton pickup never died, but the pool of potential buyers shrunk and Chrysler's financial situation became dire. The plans were ultimately scrapped, and Ram Trucks (formerly Dodge) has since chosen to offer an alternative manufacturer's engine in their Ram 1500 diesel beginning in the 2014 model year.

4.2L Cummins V6

Configuration:

V6, 90-degree

Displacement:

4.2 liters, 256 cubic inches

Bore x Stroke:

3.70" x 3.94"

Cylinder Head Material:

Aluminum alloy

Engine Block Material:

Cast iron

Injection:

Common rail, direct injection

Aspiration:

Single variable geometry turbocharger (VGT)

Valvetrain:

Single overhead cam (SOHC) 24-valve

Weight:

663 lbs

Horsepower:

270 hp @ 3,800 rpm

Torque:

420 lb-ft. @ 1,700 rpm

Dodge tossed around the idea of offering the 4.2L Cummins in the Dodge Ram 1500 pickup and Dodge Durango SUV. It was stated that in these applications the turbodiesel was capable of up to 25 mpg on the highway, 20 mpg in the city, and 22.1 mpg combined, a 44% improvement over the available gasoline engines at that time.

 

5.6L Cummins V8

Configuration:

90 degree V8

Displacement:

5.6 liters, 342 cubic inches.

Bore x Stroke:

3.70 inches x 3.94 inches

Cylinder Head Material:

Aluminum alloy

Engine Block Material:

Cast iron

Injection:

Common rail, direct injection.

Aspiration:

Single variable geometry turbocharger (VGT).

Valvetrain:

Single overheard cam (SOHC), 32 valve.

Weight:

788 lbs.

Horsepower:

325 hp @ 4,000 RPM

Torque:

460 lb-ft. @ 2,000 RPM

The 5.6L Cummins was scheduled for the Dodge Ram 1500 and Dodge Durango. The concept of making the engine standard for the Ram 2500/3500 HD also surfaced, although this was never officially made certain. The engine offered a 49% improvement in fuel economy over the gasoline engines available at the time, although Cummins smaller 5.0L V-8 is a much more potent package.