What Engine Will the 2025 RAM 2500 Have

What engine will the 2025 RAM 2500 have? The 2025 RAM 2500 offers two engineered powertrains suited to Canada's varied conditions: a 6.7L Cummins High-Output Turbo Diesel and a 6.4L HEMI V8 gasoline engine.

The 6.7L Cummins High-Output Turbo Diesel delivers 430 horsepower and 1,075 lb-ft of torque, while the 6.4L HEMI V8 produces 405 horsepower and 429 lb-ft of torque. Both engines are paired with the TorqueFlite HD eight-speed automatic transmission to balance performance, towing capability and everyday drivability.

This guide breaks down the 2025 RAM heavy duty powertrain options so you can compare engine performance, towing and payload, and cold-weather features — then decide which RAM 2500 configuration best fits your needs. Continue reading for detailed specs, towing charts and practical buying advice.

2025 RAM 2500 Engine Lineup Overview

The 2025 RAM 2500 engine lineup is built for Canadian conditions and offers two clear powertrain paths for buyers: a gasoline 6.4L HEMI V8 and a 6.7L Cummins High-Output Turbo Diesel. Both options are engineered for heavy-duty performance, with choices that suit work, towing and everyday driving across provinces.

Available Powertrain Options

Quick overview of the two engines:

- **6.4L HEMI V8 (gasoline)** — reliable everyday power, strong payload potential and lower upfront cost for many buyers.
- **6.7L Cummins High-Output Turbo Diesel** — maximum torque and superior towing capability, with improved highway fuel economy for long hauls.

Both engines are paired with the TorqueFlite HD eight-speed automatic transmission to deliver smooth shifts under load and during light driving. The transmission's adaptive logic helps the truck optimize gear selection whether the bed is empty, loaded or pulling a trailer.

These powertrains are offered across RAM 2500 trim levels — Tradesman, Big Horn, Laramie, Rebel, Power Wagon, Limited Longhorn and Limited — and in multiple cab and bed configurations (crew cab and mega cab, plus 6'4" or 8' beds). Exact engine availability by trim, cab and bed should be checked on the RAM configurator or with your dealer.

Canadian Market Specifications

Canadian-spec RAM 2500 trucks include cold-weather and heavy-use features engineered for northern climates: enhanced cooling systems, cold-start aids and diesel exhaust fluid (DEF) systems adapted for low temperatures. Many diesel models are equipped with block heaters and battery warmers as dealer or factory options — confirm standard/optional status with your local dealer.

Examples of real-world use cases to help you decide:

- Contractor in Alberta: frequent short hauls and heavy payloads — HEMI V8 or well-specified gasoline configuration can be cost-effective.
- Owner-operator towing a large RV across provinces: regular long-distance towing and higher GCWR needs — High-Output Cummins diesel is usually the preferred choice.

Transmission Pairings

Both engines use the TorqueFlite HD eight-speed automatic transmission, an advanced automatic transmission that adapts shift strategies based on load and driving conditions. The electronic column shifter helps free up interior space, while the transmission's programming improves drivability in crew cab and mega cab configurations whether you're driving empty, towing a trailer or hauling a heavy load in the bed.

If you'd like a side-by-side comparison of trims, engines and cab/bed configurations for towing and payload, continue reading to the detailed specs and towing charts below or contact your local dealer for a tailored build.

6.4L HEMI V8 Engine Specifications

The 6.4L HEMI V8 is the gasoline engine choice for many RAM 2500 buyers who need strong day-to-day performance with excellent payload capability. It's a proven powerplant for Canadian conditions and easy to service at most RAM dealerships.

- **Horsepower:** 405 hp
- **Torque:** 429 lb-ft (429 pound-feet torque)
- **Transmission:** TorqueFlite HD eight-speed automatic
- **Fuel type:** Regular gasoline

Power and Torque Output

With 405 horsepower and 429 lb-ft of torque, the HEMI V8 delivers immediate throttle response and strong low-end pull — helpful for quick merging, loaded city runs and moderate towing. Peak torque is available early in the rev range, which improves driveability whether you're hauling a full tool load in the bed or making worksite runs.

Fuel Management Technology

The HEMI uses an advanced cylinder management system that deactivates four cylinders under light load to save fuel. The transition between eight and four cylinders is seamless, giving better highway economy without sacrificing power when you need it.

Performance Characteristics

The HEMI V8 is a balanced choice for owners who prioritize payload and day-to-day usability over maximum towing. For example, contractors who carry heavy equipment in the bed (8-foot bed or standard) often prefer the gasoline HEMI for its payload advantage and lower initial cost versus a diesel configuration. Overall, the HEMI combines strong power, reliable performance and straightforward maintenance for a versatile pickup truck platform.

6.7L Cummins Turbo Diesel Engine Details

The 6.7L Cummins turbo diesel is the heavy-duty diesel option for the RAM 2500, designed for customers who need maximum towing, durability and long-distance efficiency. This cummins engine benefits from updated hardware and calibration intended to improve longevity and usable power for demanding Canadian applications.

Under the hood, the latest Cummins diesel incorporates structural and component upgrades — including a redesigned block and cylinder head, heavy-duty pistons and an improved intake manifold — aimed at increasing durability and thermal control under heavy loads.

High-Output vs Standard-Output Options

There are two diesel configurations to match different duty cycles and towing needs:

**Cummins configuration comparison**

Choose the Standard Output for robust everyday work without the premium cost; opt for the High-Output Cummins when maximum towing (trailers, large RVs, commercial trailers) and peak torque are priority. (Confirm exact towing thresholds by configuration with your dealer or the RAM towing chart.)

Turbocharging and Intercooling System

The turbocharging system uses an efficient turbocharger and enlarged airflow passages to improve spool and high-end airflow. An upgraded intercooler keeps intake temperatures down for consistent combustion and power delivery under sustained towing or high-load conditions — a benefit when driving across mountain passes or during long highway hauls.

Diesel Exhaust Fluid, Emissions and Cold-Weather Systems

The diesel engine includes modern emissions controls and a Diesel Exhaust Fluid (DEF) system engineered to meet Canadian standards while minimizing performance impact. Cold-weather features important for Canadian owners include glow-assist starting and intake/fuel system designs aimed at reliable cold starts. Top-feed injectors and a higher-pressure fuel system improve fuel metering and combustion efficiency, which supports both power and lower emissions.

As with all heavy-duty specs, confirm the precise equipment and standard/optional cold-weather items (block heater, battery warmer, DEF heaters) with your local dealer, especially if you're comparing 2025 vs 2026 model-year differences.

Towing and Payload Capabilities by Engine

The RAM 2500's two engine choices suit different hauling roles. Understanding maximum towing and payload helps you pick the right ram 2500 configuration for commercial work, recreational towing or heavy-duty jobs around Canada.

Maximum Towing Capacity Comparisons

When properly equipped, the 6.7L Cummins turbo diesel delivers the highest maximum towing capacity for the RAM 2500 — commonly cited around 16,606 kg (36,610 lbs). The gasoline 6.4L HEMI V8 also offers strong towing numbers but generally trails the diesel in peak trailer capacity.

Thanks to the TorqueFlite HD eight-speed automatic transmission and optimized gear ratios, the diesel can achieve top towing figures with a 3.42 rear axle ratio in many configurations, improving highway economy versus older 4.10 setups. Always verify towing limits for your exact cab, bed and axle configuration.

Payload Ratings and Configurations

Payload depends heavily on cab, bed and axle choices. In many RAM 2500 setups the gasoline HEMI V8 yields the highest maximum payload — figures quoted around 3,443 kg (7,590 lbs) in specific configurations — making it an excellent choice for contractors who load the bed rather than tow heavy trailers.

If you need to carry heavy equipment in an 8-foot bed or frequently operate as a work truck, payload capacity and bed configuration matter more than headline towing numbers. The diesel still offers strong payload capability in many builds, but exact numbers must be verified per VIN.

Fifth-Wheel and Gooseneck Capabilities

Both engines support fifth-wheel and gooseneck setups when the truck is properly equipped. The diesel's higher pound-feet torque at low rpm provides superior control and acceleration when pulling heavy trailers on grades, while the HEMI can be a practical alternative for lighter fifth-wheel loads.

Towing Checklist (quick)

- Confirm max towing for your exact configuration (cab, bed length, axle, trim).
- Choose the correct hitch class and ensure trailer brakes meet local requirements.
- Consider axle ratio: a 3.42 ratio can improve highway fuel economy for towing versus a 4.10 in some builds.
- Check GCWR and payload to avoid overloading the truck or trailer.

Example scenarios: a family towing a 32-ft travel trailer (approx. 10,000—15,000 lbs) will benefit from the High-Output Cummins diesel; a contractor hauling heavy tools and materials in an 8-foot bed may prefer the HEMI for payload and lower initial cost. For precise towing charts and to confirm the maximum towing and payload in pounds for a given build, consult the RAM towing guide or your dealer.

Fuel Economy and Efficiency Ratings

Fuel economy is a key consideration for Canadian RAM 2500 buyers because long distances and regional fuel prices affect running costs. The 2025 RAM 2500 offers two different powertrain approaches: the diesel route (better highway efficiency and torque for towing) and the gasoline route (HEMI V8 with cylinder deactivation for improved light-load economy).

Both engines include efficiency features: the Cummins diesel benefits from refined turbocharging and an optimized 3.42 rear axle option for many towing setups, while the 6.4L HEMI uses cylinder management to shut down four cylinders under light load.

City and Highway Consumption

Real-world consumption varies widely by load, terrain and climate. City driving (stop-and-go in urban centres such as Toronto or Vancouver) will raise fuel use, while highway driving lets the diesel's efficiency advantage show up over long distances.

**Note:** these figures are representative estimates. Actual fuel consumption depends on configuration (cab, bed, axle ratio), load, driving habits and conditions — verify official L/100 km ratings for your specific build.

Real-World Expectations

Cold weather decreases fuel efficiency for both engine types; diesel models can be more sensitive to winter starts without proper block-heater use and DEF handling. Mountainous terrain tends to favour diesel torque for maintaining speed on grades, while the HEMI V8 may require more downshifting and throttle input.

Towing increases fuel use substantially; as a guideline, expect fuel consumption to rise notably with heavier trailers — practical increases vary by trailer weight and aerodynamics, so use the towing weight and fuel-use charts when planning a build.

Cost of Ownership Considerations

Diesel typically costs more per litre in Canada, but higher highway efficiency and longevity can lower total operating cost for high-mileage, heavy-towing owners. Gasoline HEMI builds generally have lower purchase and maintenance costs and can be preferable for predominantly urban or payload-centric use.

Example compare: for 20,000 km per year and mostly highway driving, a diesel's superior L/100 km on the highway can offset higher diesel prices — but the break-even point depends on local fuel prices and how often you tow. Ask your dealer for a tailored ownership estimate.

Engine Technology and Features

The 2025 RAM 2500 pairs proven hardware with smart systems to improve reliability, efficiency and everyday performance. Both the 6.4L HEMI and the 6.7L Cummins diesel benefit from targeted engineering and electronic controls that help the truck adapt to load, weather and terrain.

Smart Load Recognition System

RAM's smart load recognition system detects whether the truck is loaded or empty and adjusts engine mapping and shift strategy accordingly. The result is better performance and fuel economy across duty cycles — more responsive power when towing or hauling, and gentler, more efficient shifts when driving light.

Winter-Ready Features

For Canadian winters, key systems reduce cold-start issues and maintain reliability:

- Glow-assist and cold-start strategies on diesel engine models to aid starting in low temperatures.
- Optional block heaters and battery warmers (confirm standard vs optional with your dealer) to improve cold starts and reduce wear.
- Fuel and intake system design that mitigates icing and improves airflow in subzero conditions.

Simplified Service and Diagnostics

The RAM 2500 is designed for easier maintenance: features such as top-feed injectors, integrated fuel filtration and service-friendly lubrication points reduce service time. Built-in diagnostics and dealer tools speed fault detection and repair, which helps keep downtime low and ownership costs predictable.

Other Available Features to Consider

Depending on trim and options, RAM 2500 buyers can add comfort and capability systems — air suspension for improved ride and load leveling, adaptive cruise for long-distance highway driving, and modern infotainment like upgraded audio systems and Apple CarPlay/Android Auto integration. Check the specific trim view and option packages for exact availability.

Choosing the Right Engine for Your Needs

Choosing the right engine for your RAM 2500 comes down to how you use the truck. Review your primary duties (towing, payload, daily commuting) and choose the powertrain that best matches those needs — below is a quick decision guide followed by practical examples.

**Quick decision flow:**

- If your priority is maximum towing (large trailers, heavy RVs, frequent long hauls) — choose the Cummins diesel, especially the High-Output when you need peak torque and towing capacity.
- If you regularly carry heavy loads in the bed (tools, materials, frequent payload work) and mostly drive locally — the 6.4L HEMI V8 is often the most cost-effective choice thanks to strong payload ratings.
- If you split time between city driving and occasional towing — consider which costs matter most (fuel and maintenance vs. purchase price) and arrange a test drive to feel the differences.

Work Truck Applications

For commercial users — construction, agriculture, landscaping — pick the engine that matches the job. Contractors who load an 8-foot bed daily and prioritize maximum payload often prefer HEMI builds for lower upfront cost and simpler maintenance. Businesses focused on towing trailers, equipment haulers or heavy implements across long distances generally benefit from the torque and durability of the Cummins diesel.

Recreational Towing Requirements

Recreational owners who tow large travel trailers or boats across provinces should prioritise towing capacity and sustained torque. The High-Output Cummins is typically the better match for heavier recreational trailers; for lighter campers or occasional towing, the HEMI provides a capable, lower-cost alternative.

Daily Driving Considerations

For daily driving in urban or suburban settings, the HEMI V8 delivers smooth, quiet operation and lower routine maintenance costs. Diesel shines on long highway runs and for owners who cover high annual kilometres. Before deciding, test-drive both engine options in the cab configuration you plan to buy (crew cab or mega cab) and confirm the exact maximum payload and towing numbers for that build.

Want help choosing? Use the RAM configurator to compare trims and view exact maximum towing and payload specs, or contact your dealer to book a test drive and a tailored ownership-cost estimate based on your expected usage. You can also explore our current selection of new Ram 2500 models to see available configurations and options.