6.7L Power Stroke vs. 6.7L Cummins

Even though the design of the new 6.7L Power Stroke and Cummins are fundamentally different, the '11 model year will mark the first time two light-truck manufacturers' diesel engines will share the same displacement. This, however, is where the similarities end. With 40 percent of its hard parts carried over from the 5.9L, the 6.7L Cummins remains a tried-and-true engine platform. On the other side of the fence is the all-new, in-house built, 6.7L Power Stroke from Ford, which shares absolutely nothing with its 6.4L predecessor.

6.7L Cummins

Based on a 20-year-old, cast-iron block and head platform, the 6.7L Cummins engine has high-horsepower potential and million-mile durability on its side. And not only that, when it debuted in '07, it already met the stringent 2010 emissions standards-thanks to a much-improved combustion cycle, in which particulate matter (PM) and NOx issues were solved in-cylinder, eliminating the need for selective catalytic reduction (SCR, or urea injection). But even with its electronics and emissions-control devices, the 6.7L Cummins remains much simpler than the competitions' V-8s.

6.7L Power Stroke

Packing 390 hp and 735 lb-ft from the factory is a statement unto itself, but the new Power Stroke features a lot of firsts in the 3/4-ton and 1-ton diesel segment. For starters, its twin-inducer turbocharger, air-to-water intercooler, and reverse-flow cylinder heads are a first in this segment. However, these are only the most eye-opening nuances. Let us remind you that, for noise and durability purposes, the engine features four rocker arms and pushrods per cylinder-also a first. Only time will tell how durable this new Power Stroke will be, but it sure looks promising on paper.

6.7L Cummins

Displacement:408 ci

Bore x Stroke (inches):4.21 x 4.88

Configuration:Inline-six

Compression Ratio:17.3:1

Engine Block:Deep-skirt cast-iron

Cylinder Heads:Cast-iron

Valvetrain:Four overhead valves (OHV), two rocker arms, and two pushrods per cylinder

Oil Capacity:12 quarts

Injection System:Bosch electronic high-pressure common-rail (26,000 psi max.)

Injection Pump:Bosch CP3

Injectors:Bosch solenoid

Turbocharger:Holset single variable nozzle (VNT) exhaust housing, single inducer

Charged Air Cooling:Air-to-air

Emissions Equipment:Exhaust gas recirculation (EGR), diesel particulate filter (DPF), and in-cylinder regeneration events

Biodiesel Compatibility Rating:B20

Horsepower:350 hp at 3,013 rpm

Torque:650 lb-ft at 1,500 rpm

Engine Weight:1,190 pounds

6.7L Power Stroke

Displacement:406 ci

Bore x Stroke (inches):3.90 x 4.25

Configuration:V-8

Compression Ratio:16.2:1

Engine Block:Deep-skirt, compacted graphite iron (CGI)

Cylinder Heads:Aluminum, reverse-flow coolant circuit

Valvetrain:Four overhead valves (OHV), four rocker arms, and four pushrods per cylinder

Oil Capacity:13 quarts

Injection System:Bosch electronic high-pressure common-rail (30,000 psi max.)

Injection Pump:Bosch CP4.2

Injectors:Bosch piezo

Turbocharger:Garrett single sequential (SST) with variable-geometry (VGT) exhaust housing, two compressor wheels, and two inducers

Charged Air Cooling:Air-to-water

Emissions Equipment:Exhaust gas recirculation (EGR), diesel oxidation catalyst, selective catalyst reduction (SCR) utilizing urea injection, and diesel particulate filter (DPF)

Biodiesel Compatibility Rating:B20

Horsepower:390 hp at 2,800 rpm

Torque:735 lb-ft at 1,600 rpm

Engine Weight:970 pounds