Date Published: February 2, 2026 | Last Modified: 1 hour ago | 4 minute read | Verified by Jarod Rosin at Redwater Dodge

Hemi vs. Cummins: Which Ram Engine is Right for You?

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Towing Capacity: The 20,000-Pound Threshold

The first thing we look at is your trailer. If you are hauling 20,000 pounds or more on a regular basis, the conversation starts and ends with the 6.7L Cummins Turbo Diesel. It is built for the "heavy-heavy" loads. However, if you’re pulling a boat, a camper, or a work trailer that sits in the 10,000 to 15,000-pound range, the 6.4L Hemi is more than enough. It’s a responsive, capable engine that treats its owners very well for moderate towing.

Torque and Terrain: Conquering the Mountains

Torque is the "grunt" that gets your load moving. The Cummins diesel delivers a massive 1,000 foot-pounds of torque, nearly double the Hemi’s 430 foot-pounds. Why does this matter? If you are frequently navigating the Rocky Mountains or steep mountain passes, that diesel torque is a lifesaver. It allows the truck to maintain speed without the engine screaming at high RPMs, providing a much more controlled and confident driving experience.

Total Cost of Ownership: Maintenance vs. Resale

The "upfront cost" is often the biggest hurdle. A gas-powered Ram is generally $10,000 to $12,000 cheaper to buy today. However, you have to look at the long game:

Maintenance: Over a 5-year average, a diesel engine will cost roughly $6,500 in maintenance compared to the Hemi’s $4,000 to $4,500.

Longevity: The Cummins is legendary. It is the only engine in its class rated for 500,000 kilometers before needing a major repair. In contrast, while the Hemi is incredibly reliable, you can expect to look at major upgrades or maintenance around the 200,000 to 250,000-kilometer mark.

Resale Value: This is where the diesel pays you back. Diesel Rams hold their value significantly better than gas models. When it’s time to trade in, that initial $10,000 investment often comes right back into your pocket.

The Verdict

The Hemi is the king of the "daily driver + weekend hauler" lifestyle. It’s cheaper to buy, cheaper to maintain, and plenty powerful for most users. But for the serious hauler, the person living in the mountains or pulling heavy equipment every day, the Cummins is an investment in durability and peace of mind.

Additional Relevant Frequently Asked Questions

Q1. Does the Cummins Diesel get better fuel economy than the Hemi?

A1. Generally, yes. While diesel fuel can sometimes be more expensive per liter, the diesel engine’s efficiency under load is superior. Over time, the fuel costs between the two often even out, making fuel price a secondary concern to towing needs.

Q2. Is the Hemi gas engine better for short city trips?

A2. Yes. Gas engines reach operating temperature faster and don't require the complex "regeneration" cycles that modern diesel particulate filters (DPF) need. If your truck is primarily a city commuter with short trips, the Hemi is the better choice.

Q3. What is the benefit of Rig Ready RAMs at Redwater Dodge?

A3. Our Rig Ready Rams are custom-built RAM trucks with the lifts, tires, and accessories you actually want, all covered under warranty and ready to hit the road the day you buy.