Last updated: November 10, 2026 · By Sports Car One Staff
The 8.0 Powerstroke doesn’t exist on any page Ford will show you. What you can order today is the 6.7-liter Power Stroke, and that’s the engine every 2027 Super Duty diesel buyer should judge. If you need a heavy-duty diesel in the next 12 months, don’t wait for a rumor with no Ford confirmation, no patent anyone has found and no model year attached.
Quick answer: The 8.0 Powerstroke is an unconfirmed rumor. Since early 2026, reports have described an 8.0-liter Ford diesel V8 with sequential turbos, over 600 hp and more than 1,400 lb-ft. Ford hasn’t commented, TFLtruck found no matching patent, and the 2027 Super Duty’s only diesel is the 6.7-liter High-Output Power Stroke at 500 hp.
What is the 8.0 Powerstroke rumor?
On March 17, 2026, Andre Smirnov of TFLtruck laid out what the reports said: an 8.0-liter turbo-diesel V8 with two sequential turbochargers, at least 600 hp, and no diesel exhaust fluid system. The supposed source was a patent filing or a leaked Ford engineering meeting.
Neither has held up. TFLtruck couldn’t find a patent covering a larger diesel or sequential turbos, and Ford didn’t reply to its request for comment. Ford-Trucks.com writer Brett Foote also found no evidence the engine is in development.
Diesel Army ran the bigger numbers on April 17, 2026. It quoted Smirnov’s line that “people are saying” the engine would make over 600 hp and over 1,400 lb-ft of torque. That’s chatter, not a spec sheet.
When would a bigger Ford diesel arrive?
Ford hasn’t given a date. Diesel Army’s headline floated 2028, tied to the next-generation Super Duty. Until Ford shows the engine, treat any model year as a guess.
One detail should make you skeptical: dropping DEF. Diesel exhaust fluid feeds the selective catalytic reduction system, which converts nitrogen oxides in the exhaust into nitrogen and water. Diesel Army pointed out that removing it would raise NOx sharply. None of the reports explain how a DEF-free engine would pass emissions rules.
What does the 6.7 Power Stroke make in 2027?
Ford’s 2027 Super Duty page lists the 6.7-liter High-Output Power Stroke at 500 hp at 2,600 rpm and 1,200 lb-ft at 1,600 rpm. It’s optional on the F-250 and F-350 from XL to Platinum and standard on the F-450.
The gas alternative is now the 7.3-liter V8, standard on the F-250 and F-350 and rated at 420 hp and 445 lb-ft. Ford trimmed the 2027 lineup to these two engines, which we covered when the 2027 Super Duty dropped its base engines.
Pay attention to how Ford quotes towing. The diesel’s 40,000-lb figure is a gooseneck rating. Ford lists 35,000 lb for a fifth wheel and 30,000 lb on a conventional hitch, so a bumper-pull trailer owner should plan around 30,000 lb before cab, bed and axle choices cut it further. Our guide to finding towing capacity by VIN shows how to get your truck’s exact number.
Ford lists maximum payload at 7,900 lb with the gas V8 and 6,935 lb with the diesel, since the diesel and its emissions hardware weigh more. Carry a slide-in camper and that 965-lb gap matters more than torque.
How does Ford’s diesel compare with Ram and GM?
| Engine | Horsepower | Torque | Source |
|---|---|---|---|
| Ford 6.7L High-Output Power Stroke (2027 Super Duty) | 500 hp | 1,200 lb-ft | Ford |
| GM 6.6L Duramax L5P (current) | 470 hp | 975 lb-ft | Ford Authority |
| Ram 6.7L Cummins HO (2027 Power Wagon) | 430 hp | 1,075 lb-ft | Ram |
Ford already leads. It beats the Cummins HO that Ram fits to the 2027 Power Wagon by 70 hp and 125 lb-ft, according to Ram’s Power Wagon announcement, and it tops GM’s current L5P Duramax by 225 lb-ft, per Ford Authority. Ford doesn’t need more displacement to win today’s spec sheet.
Pressure could come from GM. Ford Authority reported that the L5P will be replaced by a new Duramax coded L6P, with displacement and output not yet disclosed. If it beats 1,200 lb-ft, Ford has a reason to answer. See our report on the Duramax prototype seen testing in Sweden, and Ram’s side in our 6.7 Cummins horsepower by year guide.
Should you wait for the 8.0 Powerstroke?
No. The 6.7-liter Power Stroke dates to the 2011 model year, per TFLtruck, so it’s had 15 model years of fixes and calibration updates. If longevity is why you’re paying the diesel premium, the proven engine is the safer bet.
Ford could announce a new engine at any point, and we’ll update this page if it does. Until then, every figure for a larger Ford diesel traces back to unnamed sources.
8.0 Powerstroke questions buyers ask
Is Ford making an 8.0 Powerstroke?
Ford hasn’t confirmed it. Reports since early 2026 describe an 8.0-liter diesel V8 with sequential turbos, but TFLtruck found no supporting patent and Ford didn’t respond to its request for comment. The only Power Stroke Ford lists for 2027 is the 6.7-liter High-Output engine, rated at 500 hp and 1,200 lb-ft of torque.
How much horsepower does the 2027 6.7 Power Stroke have?
The 2027 6.7-liter High-Output Power Stroke makes 500 hp at 2,600 rpm and 1,200 lb-ft at 1,600 rpm, per Ford. It’s available on the F-250 and F-350 from XL through Platinum and standard on the F-450. It’s the lineup’s only diesel.
What is the max towing capacity of a 2027 Super Duty diesel?
Ford lists up to 40,000 lb for the 2027 Super Duty with the 6.7-liter diesel, but that’s a gooseneck rating. Fifth-wheel towing tops out at 35,000 lb and a conventional hitch at 30,000 lb. Your truck’s figure depends on its configuration.
The number to remember is 1,200 lb-ft. That’s what the 6.7 delivers in a 2027 Super Duty today, and it’s the bar any 8.0 Powerstroke would have to clear to justify a whole new engine.