Is the Ram 2500 gas or diesel?

The Ram 2500 is offered with both powertrains: a 6.4-liter HEMI V8 gasoline engine and a 6.7-liter Cummins Turbo Diesel inline-six. This article explains what each option offers in terms of power, towing, and real-world usability to help buyers decide which fits their needs.

In short, buyers can choose between a gas engine for everyday driving and a diesel engine for heavy-duty hauling. The choice affects performance, fuel economy, maintenance, and how you plan to use the truck for work or recreation.

Two powertrains available in the Ram 2500

Gasoline option

Below are the primary specifications and characteristics of the gasoline setup to help you compare it against the diesel option.

• Engine: 6.4-liter V8 HEMI


• Horsepower: approximately 410 hp


• Torque: approximately 429 lb-ft


• Transmission: 8-speed automatic


• Towing capacity: up to about 17,000–19,000 pounds, depending on configuration

The gasoline Ram 2500 delivers strong daily-driving performance with smoother low-end torque for on-road use and easier fuel stopovers, but it does not match the diesel option in maximum torque or long-haul capability.

Diesel option

The diesel setup is designed for heavy-duty work and long towing sessions; the following are its core specs and considerations.

• Engine: 6.7-liter Cummins Turbo Diesel inline-six


• Horsepower: roughly 370 hp


• Torque: roughly 850 lb-ft


• Transmission: 6-speed automatic


• Towing capacity: up to about 18,000–20,000 pounds, depending on configuration

The diesel Ram 2500 provides substantial pulling power and sustained torque for steep grades and long hauls. It requires Diesel Exhaust Fluid (DEF) and can have higher maintenance costs, but it tends to excel at towing efficiency and stability under load.

Performance considerations and real-world use

Choosing between gas and diesel comes down to how you plan to use the truck. The gasoline engine is well-suited for everyday driving, lighter to mid-range towing, and lower upfront costs. The diesel option shines for frequent or heavy towing, long trips, and better low-end torque for payloads and hauls. Diesel fuel economy can be more favorable on highway-heavy routes, but DEF management and maintenance intervals are factors to consider.

Which option is right for you?

If you regularly tow substantial trailers, haul heavy loads, or spend long days working the truck and you want maximum torque at lower speeds, the diesel is typically the better choice. If your duties are more mixed—daily driving with occasional towing, lower initial purchase price, and simpler maintenance—the gasoline option provides strong performance with fewer ongoing DEF considerations.

Summary

The Ram 2500 is available with two distinct powertrains: a 6.4-liter HEMI gasoline engine and a 6.7-liter Cummins turbo diesel. The gas version emphasizes everyday usability and solid towing, while the diesel emphasizes maximum torque, heavier and more sustained towing capability, and better long-haul efficiency. Your decision should align with how you plan to use the truck, your budget, and how much you expect to tow or haul on a regular basis.

Does a Ram 2500 heavy-duty take gas or diesel?

The gas-powered RAM 2500 is an excellent choice for those who need a balance of power, performance, and fuel efficiency without going the diesel route. Featuring the renowned 6.4L HEMI® V8 engine, the gas engine delivers impressive towing capabilities and power for most heavy-duty applications.

What is the difference between gas 2500 and diesel 2500?

A 2500 gas vs. diesel decision hinges on your needs: choose diesel for heavy towing, maximum torque, and long-term fuel efficiency when pulling heavy loads, as it handles demanding work better and lasts longer. Opt for gas for a lower upfront cost, lower maintenance, quieter operation, and better payload capacity if your tasks are lighter, you don't tow heavy loads constantly, and your budget is a primary concern. 
This video compares the performance of gas and diesel engines in Ram 2500 trucks: 58sRocky RohdeYouTube · Oct 13, 2025
Diesel

• Pros:
  • Superior towing and torque: Provides significantly more low-end torque, essential for towing heavy loads like large trailers or construction equipment with ease. 
  • Better fuel efficiency when towing: Achieves better mileage when under heavy load, which can lead to cost savings on long trips. 
  • Longer lifespan: Diesel engines are built to be very durable and often last longer than gas engines with proper maintenance. 
• Cons:
  • Higher upfront cost: Diesel engines have a higher initial purchase price. 
  • Higher ownership costs: Diesel fuel can be more expensive per gallon, and maintenance can be slightly more expensive over time. 
  • Less ideal for short trips: Not as suited for frequent short-distance driving, as idling can cause issues like clogged DPF filters. 
  • Heavier engine: The engine's weight can reduce the truck's payload capacity compared to a gas version. 

Gas

• Pros:
  • Lower upfront cost: The gas engine option is cheaper to buy initially. 
  • Lower maintenance costs: Generally has lower maintenance costs than a diesel engine. 
  • Quieter operation: Offers a quieter and potentially smoother ride, making it better for daily driving. 
  • Better payload capacity: The lighter engine allows for a higher payload rating. 
  • No warm-up time: Ready to go immediately, without needing to warm up. 
• Cons:
  • Lower towing capacity: Cannot tow as much weight as the diesel version. 
  • Less efficient when towing: Will consume more fuel when pulling heavy loads compared to diesel. 
  • Less torque: Doesn't provide the same level of low-end pulling power as a diesel. 

You can watch this video to learn more about the differences between gas and diesel engines: 59sGetty's GarageYouTube · Jul 12, 2023

How do I tell if my Dodge Ram is gas or diesel?

You'll also notice gasoline smells. So much stronger than diesel. And that's actually less energy per gallon than diesel does but it's a lot more dangerous and more flammable because it evaporates.

Is a Ram 2500 gas or diesel?

Diesel engines, like the ones found in RAM 2500 and 3500 models, are designed for maximum torque, making them ideal for heavy towing. If you're frequently hauling large trailers or equipment, the diesel engine's low-end power and fuel efficiency shine bright.