Elk Grove Dodge Chrysler Jeep RAM

Elk Grove Dodge Chrysler Jeep Ram · Ram 2500 Research

Ram 2500 HEMI vs Cummins: Which Engine Should You Get?

The 2027 Ram 2500 comes with two engines: the 6.4L HEMI V8 gas engine and the 6.7L Cummins High Output diesel. Here is how they compare and which one fits the way you'll use the truck.

Quick answer: Choose the 6.7L Cummins if you tow heavy and often: it makes 1,075 lb-ft and tows up to 20,000 lb. Choose the 6.4L HEMI if you haul more than you tow or tow occasionally: it carries up to 4,580 lb with the Payload Upgrade Package, costs less up front and runs on gasoline. Those are Ram's preliminary 2027 ratings.

Side by side

6.4L HEMI V86.7L Cummins HO I-6
Output405 hp / 429 lb-ft430 hp / 1,075 lb-ft
Transmission8-speed automaticTorqueFlite HD 8-speed automatic
Max towing17,740 lb20,000 lb
Max payload4,580 lb (Payload Upgrade Pkg)3,990 lb
FuelGasolineDiesel plus diesel exhaust fluid (DEF)
Exhaust brakeNoAvailable

Preliminary 2027 maximums. Your truck's rating depends on cab, bed, axle ratio, drivetrain and hitch type.

Why the diesel tows more

Horsepower is close: 405 for the HEMI, 430 for the Cummins. The difference is torque. The Cummins makes 1,075 lb-ft at low engine speeds, so it pulls a heavy trailer up a grade without revving hard, and its exhaust brake helps hold speed on the way down. That matters on the climbs Sacramento-area owners know well, like I-80 over Donner Summit and US-50 over Echo Summit. Read about towing the Sierra in a Ram 2500.

Why the gas engine carries more

The Cummins is a heavier engine, and that weight comes off the payload. The HEMI also gets an option the diesel doesn't: the new Payload Upgrade Package, which adds a 3500-spec frame, rear leaf springs and an anti-spin rear differential. It raises the truck's gross vehicle weight rating from 10,000 to 11,040 lb and payload to 4,580 lb, which Ram calls best in class. It's offered on Tradesman, Big Horn, Laramie, Limited and Limited Longhorn.

Cost of ownership

  • Up front: the Cummins is a costly option. Ask us for current pricing on both versions of the truck you're considering.
  • Fuel: the Cummins uses less fuel under load, but diesel usually costs more per gallon in California. Heavy-duty pickups aren't rated by the EPA for fuel economy, so be wary of published mpg figures.
  • DEF: the diesel needs diesel exhaust fluid topped up periodically.

Which engine fits you

If you mostly...Consider
Tow a fifth-wheel, gooseneck or large travel trailer oftenCummins
Tow long distances or over mountain passesCummins
Carry heavy loads in the bed, like a slide-in camper or materialsHEMI with Payload Upgrade Package
Tow occasionally and drive empty most of the timeHEMI
Want a winch on a Power WagonHEMI

One more note: Ram no longer offers a standard-output Cummins. Since the 2025 model year, the 430-hp High Output version is the only diesel in the Ram 2500.

More Ram 2500 research

HEMI vs Cummins FAQs

Is the HEMI or the Cummins better in a Ram 2500?

It depends on the job. The Cummins is better for frequent heavy towing, with 1,075 lb-ft and up to 20,000 lb of towing. The HEMI is better for hauling heavy loads in the bed, with up to 4,580 lb of payload, and costs less up front.

How much more can a Cummins Ram 2500 tow?

Based on Ram's preliminary 2027 ratings, up to 20,000 lb with the Cummins versus up to 17,740 lb with the HEMI, a difference of about 2,260 lb at the maximums.

Why does the HEMI Ram 2500 have more payload than the Cummins?

The gas engine weighs less than the diesel, and only the HEMI can get the Payload Upgrade Package, which adds a 3500-spec frame and rear leaf springs. That raises payload to 4,580 lb, versus 3,990 lb for the Cummins.

Is the Cummins diesel worth the extra cost?

It's usually worth it if you tow heavy trailers often or over mountain passes. If you tow a few times a year, the HEMI saves money up front and avoids diesel exhaust fluid.

Does Ram still offer the standard-output Cummins?

No. Ram dropped the standard-output Cummins for the 2025 model year. The 430-hp, 1,075-lb-ft High Output engine is the only diesel offered on the 2027 Ram 2500.

Drive both engines in Elk Grove

Elk Grove Dodge Chrysler Jeep Ram · 8575 Laguna Grove Dr, Elk Grove, CA 95757 · Sales 916-892-0515

*Specifications are based on Ram's preliminary 2027 information and may change. Max towing and payload require proper equipment; actual capacity varies by cab, bed, axle and drivetrain, and passengers and cargo reduce towing capacity. Pricing on in-stock vehicles excludes government fees and taxes, any finance charges, dealer document processing charge and emission testing charge. Contact Elk Grove Dodge Chrysler Jeep Ram for current pricing and availability.

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