Ford has a wide range of engines available for its F-250 and F-350 Super Duty trucks. But it can be a little confusing because the engine displacements are so similar, yet are actually quite different powerplants. And its newest, the 6.8-liter V8, is the same displacement as its past V10 truck engine. Four engines are available, split between two gas-powered and two diesel engines. 

6.8-liter F-250 V8

Let’s start with Ford’s newest Super Duty engine, the 6.8-liter V8. It is replacing the 6.2-liter V8 that has been around for ages. It is derived from Ford’s 7.3-liter Godzilla engine, so it too is an iron block with aluminum heads. While it maintains the same bore as the 7.3-liter, the crank stroke has been shortened from 3.98 inches to 3.64 inches. 

Compression is raised slightly from the 7.3-liter’s 10.5:1 lb-ft to 10.8:1 lb-ft. While higher compression engines usually require richer gasoline, Ford says it still recommends 87-octane gas. 

The gas burner is so new that Ford hasn’t released horsepower or torque ratings yet. So the engine it is replacing was rated at 385 hp and 420 lb-ft of torque. The larger 7.3-liter V8 puts out 430 hp and 475 lbs of torque. We expect two things to happen in this regard.

We expect that the 5.3-liter will see an increase in both horsepower and torque. So we’re pretty sure that this new 6.8 will see power around 400 to 420 hp, with torque ratings at around 460 lb-ft. 

7.3-liter F-250 Godzilla V8

As we stated earlier, the 7.3-liter V8 is the top-of-the-line Ford Super Duty gas engine. Much about it is the same as the 6.8-liter derived from it. Compression and stroke are the only real differences. Both are sequential multi-port direct injection engines. And both might be considered old school, being pushrod engines with two valves per cylinder, as opposed to overhead cams. 

They are also naturally aspirated, though adding a supercharger or turbocharging in the near future would create a nice bump in power. But Ford has found a way to keep them competitive, and clean. Right now, Ford is not giving out power or torque specs, which leads us to believe both numbers will see increases from 2022. 

6.7-liter PowerStroke diesel and High-Output diesel V8

The 6.7 PowerStroke has been Ford’s go-to diesel engine for over a decade. It has seen continued improvements in both horsepower and torque. Both are identical, with one big difference. 

The High Output version has a water-cooled turbocharger according to turbos.com This allows extra cooling to the bearings, which increases longevity and response. But the main benefit may actually be when the engine is turned off.

Once a turbocharger stops spinning, heat that has built up goes to the center of the turbo. It can fry bearings after so many cycles. Water in the center of the turbo helps to dissipate the heat away from the bearings, adding to the turbocharger’s longevity. That is the difference between the two PowerStroke diesel engines.