6.7L Cummins Horsepower & Torque by Model Year: 2018–2025 Ram 2500 Guide
Performance Dodge Blog · Cummins Diesel Specs
6.7 Cummins Power, Year by Year
Ask five truck owners how much hp does a 6.7 Cummins have and you may hear five different numbers. Most of them are right. Ram has rated the same 6.7-liter inline-six differently over the years, depending on the model year, the transmission behind it, and whether the truck was a Ram 2500 or a Ram 3500.
This guide lays out 6.7 Cummins horsepower and torque for every Ram 2500 from 2018 through 2025, explains why the numbers moved, and shows what those ratings mean when you shop new or used in South Jersey.
The 6.7L Cummins has powered Ram heavy-duty pickups since the 2007.5 model year.
In This Article
Key Takeaways
- ✓The 2025 Ram 2500 Cummins is rated at 430 hp and 1,075 lb-ft
- ✓From 2019 to 2024, the Ram 2500 Cummins made 370 hp and 850 lb-ft
- ✓The 2018 Ram 2500 automatic made 370 hp and 800 lb-ft
- ✓Before 2025, the High Output Cummins was a Ram 3500 exclusive
- ✓2025 swapped the six-speed automatic for a new eight-speed
Why 6.7 Cummins Ratings Change From Year to Year
The 6.7-liter Cummins arrived in Ram heavy-duty pickups partway through the 2007 model year. The basic recipe has stayed the same: six cylinders in a row, a turbocharger, and iron construction built for long hours under load. What has changed is how hard Ram and Cummins are willing to push the engine, and that depends heavily on the transmission bolted behind it.
For most of the last decade, Ram ran two versions. A standard-output Cummins paired with the 68RFE six-speed automatic went into the Ram 2500. A High Output version paired with the heavier-duty Aisin six-speed went into the Ram 3500, where the extra torque could be handled by a stronger gearbox and chassis. That split is why a 2022 Ram 2500 and a 2022 Ram 3500 share the same engine badge but carry very different torque ratings.
Horsepower vs. Torque: Which Number Matters?
Horsepower describes how much work an engine can do at speed. Torque describes how hard it pulls at low rpm, which is what gets a loaded trailer rolling from a stop on Mantua Pike or up a busy on-ramp. A diesel like the Cummins makes peak torque low in the rev range, around 1,700 to 1,800 rpm, which is why Cummins hp and torque figures look so lopsided next to a gas V8.
For towing, torque and gearing usually matter more than peak horsepower. That is why our 2025 Ram 2500 Cummins specs page lists both numbers along with the rpm where each one peaks.
Torque, more than peak horsepower, does the real work when a Ram 2500 tows.
Ram 2500 Cummins Horsepower and Torque by Model Year
Here is how the ratings moved across the last eight model years of the Ram 2500, with Ram 3500 High Output figures noted for context.
1
2018: The Last Fourth-Generation Truck
The 2018 Ram 2500 with the Cummins and the 68RFE automatic was rated at 370 horsepower and 800 lb-ft. Buyers could still order a six-speed manual, rated lower at 350 horsepower and 660 lb-ft. The 2018 Ram 3500 High Output made 385 horsepower and 930 lb-ft.
2
2019 and 2020: A New Truck and a Stronger Engine
The redesigned 2019 Ram Heavy Duty brought a reworked Cummins with a compacted graphite iron block, a larger variable-geometry turbocharger, and a 29,000 psi fuel system. Ram 2500 torque climbed to 850 lb-ft at 1,700 rpm while horsepower held at 370. The Ram 3500 High Output became the first pickup engine rated at 1,000 lb-ft, with 400 horsepower. The manual transmission was gone.
3
2021 to 2024: Steady 2500, Stronger 3500
From 2021 through 2024, the Ram 2500 Cummins stayed at 370 horsepower and 850 lb-ft while the 3500 High Output rose to 420 horsepower and 1,075 lb-ft. For used truck shoppers, this four-year stretch is the easiest to compare, since every 2500 Cummins from these years carries the same rating.
4
2025: High Output Comes to the 2500
The 2025 model year delivered the biggest jump in the 2500’s history. Ram dropped the standard-output engine and gave every Cummins pickup the High Output tune at 430 horsepower and 1,075 lb-ft, paired with a new eight-speed automatic. That is 60 more horsepower and 225 more lb-ft than the 2024 truck, and Ram quotes a 0 to 60 mph time of 6.9 seconds.
6.7L Cummins HP and Torque at a Glance
Use this table as a quick reference when comparing listings or checking a truck you already own. The 6.7L Cummins hp rating in the 2500 stayed at 370 from 2018 to 2024, so torque is what separates those years.
| Model Year | Ram 2500 Cummins | Transmission | Ram 3500 High Output |
|---|---|---|---|
| 2018 | 370 hp / 800 lb-ft (manual: 350 hp / 660 lb-ft) | 6-speed auto or 6-speed manual | 385 hp / 930 lb-ft |
| 2019 to 2020 | 370 hp / 850 lb-ft | 6-speed automatic | 400 hp / 1,000 lb-ft |
| 2021 to 2024 | 370 hp / 850 lb-ft | 6-speed automatic | 420 hp / 1,075 lb-ft |
| 2025 | 430 hp / 1,075 lb-ft | 8-speed automatic | Same 430 hp / 1,075 lb-ft |
Figures are Ram’s published ratings for each model year. Confirm the engine and transmission on a specific truck with its window sticker or VIN.
What These Ratings Mean When You Tow
More torque does not raise a tow rating on its own, because the frame, axles, brakes, cooling, and hitch all have limits too. Still, Cummins upgrades have tracked closely with Ram 2500 towing gains. A properly equipped 2025 Ram 2500 Cummins is rated to tow up to 20,000 pounds, and you can see how that breaks down by cab, box, and drivetrain on our 2025 Ram 2500 towing capacity page.
You feel the difference most on grades and merges. A 2025 truck with 1,075 lb-ft and eight gears holds speed with fewer downshifts than a 2019 truck with 850 lb-ft and six gears. If you tow a camper to the shore or equipment to job sites, you notice it by the end of a long day.
Still deciding between diesel and gas? Our breakdown of the Ram 2500 Cummins vs. 6.4L HEMI walks through cost, maintenance, and real-world use.
Shopping a New or Used Ram 2500 Cummins
Because ratings changed so much across these years, go into your search with a short checklist:
- Choose a 2025 or newer truck if you want the 430 hp High Output rating in a 2500
- A 2019 to 2024 Ram 2500 is a strong used value if 850 lb-ft covers your heaviest trailer
- Confirm whether a used 2018 has the automatic or the six-speed manual
- Ask for service records, since oil and fuel filter history matters more than mileage on a diesel
Compare current new Ram 2500 inventory with used Ram 2500 trucks for sale in Woodbury to see which years fit your budget. Our look at what changed from the 2024 to the 2025 Ram 2500 covers the cab, tech, and styling updates that arrived with the new rating.
Expert Insight: Read the Torque Curve, Not Just the Peak
Peak numbers make headlines, but the Cummins earns its reputation in the middle of the rev range. When you test drive trucks from different years, take a long grade with a load if you can. A truck that holds its gear and speed without hunting for a downshift will tow comfortably for years. Pair that with a look at the maintenance history, because a well-kept 370 hp truck will outwork a neglected 430 hp one.
Compare Cummins Model Years in Woodbury, NJ
At Performance Dodge RAM, you can sit in a 2025 Ram 2500 Cummins, compare it with a pre-owned truck, and feel how each one pulls. Our team can walk you through the full 2025 Ram 2500 Cummins engine details and match them to the trailer you plan to tow.
Before you visit, you can schedule a test drive, value your trade, or estimate payments with our payment calculator. Once the truck is yours, our service department handles the routine diesel maintenance that keeps a Cummins strong for the long haul.
Bringing It All Together
The honest answer to most Ram Cummins horsepower questions is that it depends on the year. A 2018 Ram 2500 automatic makes 370 hp and 800 lb-ft, a 2019 to 2024 truck makes 370 hp and 850 lb-ft, and the 2025 Ram 2500 jumps to 430 hp and 1,075 lb-ft with an eight-speed automatic.
If you want the strongest Ram 2500 built so far, start with the 2025 Ram 2500 Cummins specs and engine details, then stop by our Woodbury showroom to see one in person.
Ready to Feel 1,075 lb-ft for Yourself?
Visit Performance Dodge RAM in Woodbury, NJ, to test drive the 2025 Ram 2500 Cummins, compare model years, and plan the towing setup that fits your work.
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