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 & torque curves.
Note that this is a prototype engine and never reached the production phase.