Understanding the 2027 Ram Power Wagon's Cummins Diesel Engine

Ram enthusiasts have long requested a diesel-powered Power Wagon, and the brand has delivered. The 2027 Ram Power Wagon now offers the legendary 6.7-litre Cummins High-Output turbo diesel engine, combining proven off-road capability with the power and efficiency that diesel owners demand. This marks the first time the iconic off-road truck can be equipped with Cummins power, expanding its appeal to drivers who prioritize towing capacity, extended range, and diesel torque.

The addition of the Cummins diesel to the Power Wagon lineup marks a major step forward for Ram's most capable off-road truck. With 430 horsepower and 1,075 lb-ft of torque, this powertrain transforms the Power Wagon into a versatile machine that excels at both trail running and heavy hauling. Here's what drivers need to know about this new diesel option.

The 6.7-Litre Cummins High-Output Engine

The 6.7-litre Cummins High-Output turbo diesel inline-six engine delivers 430 horsepower and best-in-class base diesel torque of 1,075 lb-ft. This inline-six cylinder engine features turbocharging and intercooling, with electronic high-pressure common rail fuel injection ensuring precise fuel delivery. The engine's compacted graphite iron block and cast-iron head construction provide durability for demanding applications.

The Cummins diesel operates on ultra-low sulfur diesel fuel and uses selective catalytic reduction for emission control. The engine's 16.2:1 compression ratio optimizes efficiency and power delivery across the operating range.

Transmission and Drivetrain Configuration

The 2027 Ram Power Wagon with Cummins diesel pairs the engine with the TorqueFlite HD eight-speed automatic transmission. This adaptive electronic control transmission features five clutch-pack design with only two open clutches in any gear, contributing to smooth shifts and efficient power transfer.

A new 3.42 rear axle ratio optimizes the diesel's torque delivery. This ratio provides higher final drive in gears one through six for confident towing performance and acceleration, while gears seven and eight offer lower ratios for improved highway fuel economy and reduced noise, vibration and harshness.

The Power Wagon diesel features solid front and rear axles with class-exclusive locking differentials activated by electromagnetic actuators. The front axle measures 235 millimetres and the rear axle measures 292 millimetres, delivering power through upgraded 38-millimetre rear axle shafts directly to the 34-inch tire and wheel combination.

Off-Road Capability and Suspension

The 2027 Ram Power Wagon with Cummins diesel maintains its title as the most off-road-capable full-size pickup. The truck features front and rear electronic-locking differentials, Bilstein shocks, extensive underbody protection, and a class-exclusive disconnecting front stabilizer bar. Hill Descent Control and Mopar accessory rock rails come standard.

Key Off-Road Features:

• 24.6-degree approach angle and 25.5-degree departure angle
• 320 millimetres of ground clearance
• 19.7-degree breakover angle
• Class-exclusive five-link coil rear suspension

The advanced three-link front suspension ensures roll stiffness, while the unique Power Wagon design incorporates Bilstein monotube shocks and the class-exclusive electronic disconnecting sway bar. This allows the front axle to move more independently of the truck's frame for improved articulation and overall off-road capability.

The rear axle features Ram's class-exclusive five-link coil suspension, cushioned by Bilstein monotube shocks and coil springs. A Bilstein dampener connects the rear axle to the frame for enhanced control and stability. This design offers improved ride quality and articulation compared to traditional leaf springs, balancing payload capability with ride comfort. Available class-exclusive Automatic-Leveling Rear Air Suspension takes comfort and capability further.

Towing and Payload Capacity

The diesel-powered Power Wagon delivers substantial capability for work and recreation. Tow rating reaches nearly 9,072 kilograms (20,000 pounds), while payload capacity approaches 1,360 kilograms (3,000 pounds). This makes the truck suitable for hauling ATVs, side-by-sides, bed storage systems, drop-in campers and trailers.

For the first time, the Power Wagon diesel can be optioned with fifth-wheel and gooseneck preparation. Automatic-Leveling Rear Air Suspension maintains a level stance under heavy loads and incorporates a Bed Lowering Mode for effortless trailer hook-up.

The Towing Technology Group and Tow Technology Plus Group expand the Ram 2500's innate capability:

Towing Technology Group:

• LED third brake light with Cargo-View Camera
• Surround 360-degree camera system
• Trailer Reverse Guidance
• Trailer Tire Pressure Monitoring System

Tow Technology Plus Group:

• Digital Rearview Mirror 3.0
• Trailer Reverse Steering Control

Range and Fuel Efficiency

A standard 117-litre fuel tank enables an estimated 966-kilometre range, ideal for overlanders looking to spend days off the beaten path. The diesel's efficiency combined with the substantial fuel capacity means fewer stops during long journeys or remote expeditions.

The combination of the Cummins diesel's fuel efficiency and the large tank capacity makes the 2027 Power Wagon particularly well-suited for extended off-road adventures where fuel availability may be limited. The 3.42 axle ratio paired with the eight-speed automatic transmission optimizes highway fuel economy in the top gears while maintaining strong performance in lower gears.

Exterior Design and Protection

The 2027 Ram Power Wagon with Cummins diesel is available in a 4x4 crew cab configuration with a six-foot, four-inch bed. The truck features an aggressive sport performance hood, functional wheel arch extensions that protect the fenders and body from trail damage, and standard Power Wagon bedside graphics with Satin Black accents, including Cummins badging on the front fenders.

Underbody skid plates protect the Diesel Exhaust Fluid tank, fuel tank and transfer case. The truck rides on 20-inch Satin Black wheels with machined accents and 34-inch all-terrain tires, balancing heavy hauling capability with off-road prowess.

Optional exterior upgrades include body-colour door handles, extended LED lighting for the cab and bed, and the class-exclusive RamBox cargo management system for added secure storage during outdoor adventures. Buyers can also option class-exclusive heated power convex trailer tow mirrors with power-folding, power-telescoping and memory functionality.

Interior Comfort and Technology

Inside, the 2027 Ram Power Wagon with Cummins diesel offers the same best-in-class interior found across the Ram Heavy Duty lineup. A heated cloth bench seat is available as standard, with the option to upgrade to heated and ventilated leather-trimmed bucket seats. The Power Wagon Level 2 Equipment Group adds extended leather touchpoints for an elevated experience, including the grab handles and column shifter.

Standard technology and safety features include a 12-inch Uconnect 5 touchscreen infotainment system, integrated trailer brake controller, ParkView rear backup camera with dynamic gridlines, and ParkSense front and rear park assist. Advanced safety features such as Adaptive Cruise Control, Blind-spot Monitoring with trailer coverage, Pedestrian Detection, and Rear Cross Path Detection also come standard.

Optional upgrades include a 14.5-inch Uconnect 5 touchscreen infotainment system, class-exclusive Front Passenger Interactive Display, trailer tow and off-road info pages, and premium amplified audio systems from Alpine (9-speaker) or Harman Kardon (17-speaker).

Availability and Market Position

The Ram Power Wagon with Cummins turbo diesel arrives in the second half of 2026. This addition expands Ram's halo truck portfolio, combining proven Cummins power with unmatched towing capability, extended range and off-road performance for customers who demand serious capability.

The Power Wagon nameplate has a storied history dating back to 1945, when early trucks were based on the Weapons Carrier series of Dodge three-quarter-ton military-use trucks built during World War II. The iconic truck was reintroduced in 2005 and now exists as an independent model within the Ram Heavy Duty lineup.

Coming Soon: The 2027 Ram Power Wagon at Summit Dodge

The 2027 Ram Power Wagon with Cummins diesel marks a major evolution for Ram's most capable off-road truck. By pairing the legendary 6.7-litre Cummins High-Output turbo diesel with the Power Wagon's proven off-road capability, Ram delivers a truck that excels at both trail running and heavy hauling. The combination of 1,075 lb-ft of torque, extended range, and class-exclusive features like the disconnecting front stabilizer bar and five-link coil rear suspension makes this truck uniquely capable.

Contact our team at Summit Dodge to learn more about the upcoming 2027 Ram Power Wagon with Cummins diesel and reserve your place in line.