2025 Ram Heavy Duty: New Cummins Engine Delivers Better Towing, MPG
What else is new on the 2025 Ram 2500 and 3500 Heavy Duty models?

The 2025 Ram 2500 gains about 1,000 lbs. in maximum towing capacity over the previous model with the new Cummins engine. (Laramie trim shown.)
Ram
After the light-duty Ram 1500 was updated in 2024, the Ram Heavy Duty lineup gets its turn with added towing capabilities, quicker 0-to-60 times, and more tech for 2025.
The 2025 Ram 2500 and 3500 Heavy Duty models feature two engines — the standard 6.4-liter HEMI V-8 engine and a new 6.7-liter Cummins Turbo Diesel engine that produces 430 hp and 1,075 lb.-ft. of torque.
The new 8-Speed TorqueFlite HD Transmission replaces the 6-speed automatic transmission from 2024 models.
2025 Ram Heavy Duty: More Efficient Towing
With the new Cummins engine, the latest 2500 gains about 1,000 lbs. in maximum towing capacity over the previous model. Max towing for the 3500 stays about the same but has moved from the 4.10 axle ratio to a more efficient 3.42 axle ratio for better fuel efficiency without sacrificing performance.
The 2025 Ram 2500 shaves a full 1.1 seconds off its 0 to 60 time (6.9 seconds vs 8.0 seconds).

The new 6.7-liter Cummins Turbo Diesel engine upgrades to 430 hp and 1,075 lb.-ft. of torque.
Ram
2025 Ram Heavy Duty: Exterior, Interior Upgrades
On the outside, the 2025 Ram Heavy Duty hasn’t strayed too far from its roots, but a new grille and split-LED headlamps give it a more modern look.
Inside, the new Uconnect 5 infotainment system goes big with a new 14.5-inch driver’s screen, 10.25-inch passenger screen, and 12.3-inch digital instrument cluster.
The passenger screen offers an HDMI plug to connect a device that turns the touchscreen into a projected extension of the device that allows internet searches, music and app use through the Uconnect 5 system.
The layout is completed with a digital rearview mirror and a dual wireless phone charging pad. The dial shifter moves to the column to free up dash space.

The new Ram Heavy Duty models feature bigger screens and a shifter that has moved from a dial to the stalk.
Ram
2025 Ram Heavy Duty: What Else is New?
Other new features for 2025 include:
An on-board power inverter that can produce up to 2.4 kilowatts and features two covered 110-volt outlets inside the bed.
Adaptive Cruise Control, Forward Collision Warning-Plus, ParkSense Assist arenow standard on the Big Horn trim and higher, where they were previously only available as options on all trim levels.
Drowsy driver detection, traffic sign recognition, and active lane management are new safety features for 2025.
The 360-Degree Surround-View Camera with Trailer Reverse Guidance provides a single display view of both sides of a trailer. While a 360-degree surround-view camera was available as an option on higher trims in 2024, the trailer reverse guidance was not included.
The Auxiliary Exterior Camera now comes with custom positioning, allowing users to mount and adjust the camera in and behind trailers for enhanced visibility.
2025 Ram Heavy Duty: Lineup & Pricing
For 2025, the Ram Heavy Duty lineup stays the same with these models: Tradesman, Big Horn/Lone Star, Laramie, Rebel, Power Wagon, Limited Longhorn, and Limited.
Pricing for the 2025 Ram Heavy Duty starts at $47,560, including destination, for the 2500 model. The new base price is only $315 more than the 2024 Ram 2500 Tradesman, the lowest trim on the outgoing line.
The Ram 3500 Heavy Duty starts at $48,565, including destination, which is only $315 more than the 2024 model.
The new Ram Heavy Duty lineup arrives at dealerships in the first quarter of 2025.
More Vehicle Research

Mid-Atlantic Advanced Transportation Summit to Explore Fleet Fuels, Infrastructure, and Transportation Innovation
Fleet Forward Conference expands collaboration with Clean Cities organizations as part of a broader effort to connect fleet leaders with emerging transportation technologies and strategies.
Read More →
America's 250th Birthday: Vehicles That Kept the Country Moving Over the Years
As the United States celebrates its 250th anniversary, Automotive Fleet looks back at 11 vehicles that helped shape commercial transportation.
Read More →
Can AI Really Make Fleet Drivers Safer?
Chris Brown and Wheels rep David Glines discuss how AI is reshaping safety for fleet drivers.
Read More →
GMC Previews Redesigned 2027 Sierra 1500 with New V8 Engines, Expanded Technology
The next-generation Sierra arrives later this year with new powertrains, a fully redesigned cabin, and trims aimed at the premium end of the full-size pickup segment.
Read More →
Slate Debuts Colorful, Unique EV Models
A recent media and client event, studded with electric vehicles dressed up on platforms, planted a new position for the manufacturer in the wider EV market. Fleets will find cost-saving advantages.
Read More →
Slate Electric SUV, Pickup Switchable Model Aims For Light-Duty Fleets
Everything about this EV is counterintuitive and understated, making it stand out from the crowd.
Read More →
Polestar Barred from U.S. Market Under Connected Vehicle Rule
The automaker loses its authorization to sell new vehicles in the U.S., starting with the 2027 model year. Polestar owners will retain access to the brand's service network.
Read More →
2027 Nissan Frontier Adds Sport Edition Package, New Features
Sport Edition joins the lineup with PRO-4X-inspired styling and off-road-oriented equipment; Frontier starts at $32,490.
Read More →
Chevrolet Brings Duramax Diesel to Work Truck Trim in Next-Generation 2027 Silverado 1500
The 2027 Silverado 1500 adds Duramax diesel availability to the Work Truck trim, introduces two new V-8 engines, and standardizes a 16.3-inch center display across all trims. Pricing and specifications are pending.
Read More →
Recalls, Recognition, and Ram's Big Return | AF News Recap
This week's fleet headlines highlight a mix of industry leadership and an important safety reminder for fleet professionals.
Read More →