The Ram 2500 Cummins Diesel and Its Working Numbers
The 2027 Ram 2500 diesel is built to haul serious weight. Whether you’re pulling a horse trailer through the Ottawa Valley or moving a fifth-wheel camper up to Algonquin Park, this truck is purpose-built for heavy towing. As of the 2026 model year, the 6.7L Cummins Turbo Diesel produces up to 1,075 lb-ft of torque […]
The 2027 Ram 2500 diesel is built to haul serious weight. Whether you’re pulling a horse trailer through the Ottawa Valley or moving a fifth-wheel camper up to Algonquin Park, this truck is purpose-built for heavy towing. As of the 2026 model year, the 6.7L Cummins Turbo Diesel produces up to 1,075 lb-ft of torque when properly equipped, and that number only holds when your configuration is right.
One towing figure never tells the whole story. The phrase “when properly equipped” appears on every spec sheet for a reason. Your actual towing capacity depends on hitch type, axle ratio, cab configuration, and how much cargo rides in the bed. Here’s what each of those factors means in practice, so you know what to expect before you hitch up.
Ram Canada has not yet published official 2027 specifications as of late 2026, so the figures referenced here reflect confirmed 2026 model year data from Ram Canada’s official Ram 2500 truck page. Contact Southbank Dodge’s Ram 2500 inventory for the latest 2027 details as they become available.
Why the 6.7L Cummins Diesel Is the Towing Engine for Ottawa Drivers
Torque moves trailers. Horsepower matters at highway speed, but torque is what gets a heavy load rolling from a dead stop and pulls it up a steep grade. That distinction matters before you choose between the gas and diesel Ram 2500.
For the 2026 model year, the standard 6.4L HEMI V8 produces 405 hp and 429 lb-ft of torque, solid numbers for a gas engine. The 6.7L Cummins Turbo Diesel, however, delivers up to 1,075 lb-ft of torque when properly equipped. That’s more than double the gas engine’s torque output. The difference is real, and you feel it on a loaded trailer.
Standard vs. High Output Cummins
Ram offers two versions of the 6.7L Cummins diesel in the 2027 Ram 2500 diesel lineup: a base-output variant and a High Output variant. The 1,075 lb-ft figure is the High Output variant’s rated maximum when properly equipped. Ram Canada has not published separate output figures for the base variant at this time. The team at Southbank Dodge in south Ottawa can tell you which Cummins option fits your needs.
What “When Properly Equipped” Actually Means
This phrase changes everything. Maximum towing capacity requires a specific combination of equipment. Here’s what factors into that number:
- Hitch type (fifth-wheel or gooseneck vs. conventional bumper-pull)
- Rear axle ratio (higher ratios like 4.10 generally support heavier loads)
- Cab and bed configuration
- Available towing packages and trailer equipment groups
- Trailer brake controller (electronic trailer brake control is standard on Big Horn and above)
Miss one piece and your real-world tow rating drops. A conventional bumper-pull hitch handles less weight than a fifth-wheel setup in the bed. That single variable can shift your capacity by thousands of pounds.
Hitch Types and How They Change Your 2027 Ram 2500 Diesel Capacity
The hitch type you use is the biggest single factor in your towing number. Three main configurations apply to the Ram 2500 diesel. Understanding these before you order saves real frustration on job sites and campgrounds across Ontario.
Conventional (Bumper-Pull) Towing
This is the Class V hitch receiver that comes with the truck, paired with a 4- and 7-pin wiring harness. It works well for boat trailers, utility trailers, and smaller enclosed trailers. Conventional towing capacities are lower than fifth-wheel ratings because the hitch point sits behind the rear axle.
Fifth-Wheel and Gooseneck Towing
For maximum capacity, fifth-wheel and gooseneck setups place the hitch point directly over the rear axle. Weight distribution improves significantly as a result. This configuration is what unlocks the highest tow ratings on the 2027 Ram 2500 diesel. Horse trailers, large RVs, and flatbed equipment trailers typically use these setups.
What 20,000 Pounds Looks Like in Practice
To put heavy towing in perspective, here are common loads Ottawa-area owners pull:
- Two-horse trailer with living quarters: 8,000 to 12,000 lbs
- 30-foot fifth-wheel camper: 10,000 to 14,000 lbs
- Equipment trailer with a compact excavator: 15,000 to 18,000 lbs
- Large fifth-wheel RV (35+ feet): 16,000 to 20,000 lbs
If your trailer weighs 16,000 lbs, you still have meaningful headroom for cargo and passengers. That margin matters on long hauls through eastern Ontario.
Weight, Payload, and Why GVWR Matters for the Ram 2500 Diesel
Your truck’s own weight directly affects how much it can tow. Every pound of passengers, tools, and cargo in the bed reduces your available payload, which limits how much tongue weight you can safely carry from your trailer.
How Payload Connects to Towing
Tongue weight, the downward force the trailer exerts on the hitch, typically runs 10% of total trailer weight for conventional hitches, and somewhat higher for fifth-wheel setups. That tongue weight counts against your payload capacity. So if your bed is already carrying 500 lbs of gear, you’ve reduced the tongue weight you can handle by that same amount.
Because of this, a lightly loaded truck can tow more safely than one packed with supplies. Plan your load before you hitch up.
Power Wagon Is a Different Tool
The Power Wagon is a 2500-exclusive off-road variant with Ram Articulink suspension, Tru-Lok front and rear locking differentials, and Bilstein shocks. It’s built for trail capability rather than maximum towing. Its raised ride height and off-road suspension geometry mean different tow ratings than a Laramie or Limited configured for highway hauling. That said, it remains a solid tower for its intended use.
How to Configure Your 2027 Ram 2500 Diesel for Maximum Towing Near Ottawa
Choosing the right configuration before you order is the smartest move you can make. Here’s a checklist to work through:
- Select the 6.7L Cummins diesel (High Output if available for your trim)
- Confirm the rear axle ratio that supports your target tow weight
- Add a fifth-wheel or gooseneck prep package if you’re towing large trailers
- Ensure power trailer tow mirrors with supplemental turn signals are included
- Verify electronic trailer brake control is part of your build
- Consider bed length based on your hitch type
For a broader look at what the heavy-duty Ram lineup delivers, see our overview of the 2026 Ram 2500 and the heavy work it’s built to do. If you’re also weighing a light-duty option, our post on how the 2026 Ram 1500 handles work and towing in Ottawa covers that ground in detail.
The team at Southbank Dodge in south Ottawa can walk you through every configuration option in person. Browse current Ram 2500 inventory to see what’s available, or book a service appointment if your current truck needs attention before towing season.
Frequently Asked Questions
How much can a 2027 Ram 2500 diesel tow?
The answer depends on your hitch type, axle ratio, and how the truck is configured. Fifth-wheel and gooseneck setups unlock the highest capacity, while conventional bumper-pull hitches handle less weight. Based on 2026 model year specs, the 6.7L Cummins Turbo Diesel produces up to 1,075 lb-ft of torque when properly equipped. Ram Canada has not yet released confirmed 2027 towing figures, so contact Southbank Dodge in Ottawa for the most current numbers as they’re published.
How much does a Ram 2500 diesel weigh?
Curb weight varies by cab size, bed length, and trim level. The diesel engine adds weight compared to the gas V8, and four-wheel-drive models weigh more than two-wheel-drive versions. Your truck’s Gross Vehicle Weight Rating determines the combined maximum of the vehicle, passengers, and cargo. Check the door jamb sticker or ask Southbank Dodge for the exact curb weight of the configuration you’re considering.
Disclaimer: Content contained in this post is for informational purposes only and may include features and options from US or international models. Please contact the dealership for more information or to confirm vehicle, feature availability.
