6.4 Hemi Vs. 6.7 Cummins: Which One Is The Best?

It is common to spark a debate on 6.4 Hemi vs. 6.7 Cummins because of their strength. Are you among those people who are unsure about which engine to buy for your heavy-duty truck? 

If you observe closely, you will see it’s not about which engine is the best. It’s about which engine you need for yourself. So, let’s focus on what engine you need that can fulfill your requirements. 

In this blog, I will share the difference between 6.4 Hemi vs. 6.7 Cummins, and you will decide which one is best for you. 

6.4 Hemi Vs. 6.7 Cummins: Introduction

The 6.4 Hemi offers greater horsepower and payload capacity. Therefore, it is suitable for those who prioritize quick acceleration and the ability to carry heavier loads within the vehicle. Meanwhile, the 6.7 Cummins takes the lead in towing capacity and torque.

6.4L Hemi Engine

With a torque of 850 lb-ft, the 6.7 Cummins is ideal for jobs requiring great towing capacity. That is making it a desirable choice for those who regularly transport large or heavy loads in trailers.

If you crave exhilarating power and a quick, spirited drive, the 6.4 Hemi with its 410 horsepower is your go-to choice. For those towing substantial loads – trailers, boats, or heavy cargo – the 6.7 Cummins emerges as the practical solution. 

6.7L Cummins Engine

Professionals relying on a hefty payload capacity for daily tasks might find the 6.4 Hemi the ideal companion. On the other hand, if you’re a long-haul driver logging severe miles, the 6.7 Cummins becomes the engine of choice.  

Comparison Chart of 6.4 Hemi Vs. 6.7 Cummins

Feature6.4 Hemi6.7 Cummins
Engine TypeGasoline V8Turbocharged Diesel I6
Horsepower410 hp370-420 hp
Torque (lb-ft)429 lb-ft850-1075 lb-ft
Fuel Economy (Combined MPG)17 mpg20 mpg
Fuel Economy (Towing MPG)12 mpg15 mpg
Initial CostLowerHigher
Maintenance CostLowerHigher
Towing CapacityUp to 17,730 lbsUp to 119,980 lbs
Payload CapacityUp to 4,000 lbsUp to 3,140 lbs
Ride QualitySmoother and quieterRougher and louder
Ideal ForDaily driving, light haulingHeavy hauling, towing

Key Difference between 6.4 Hemi and 6.7 Cummins

Maintenance Cost

6.4 Hemi delivers power without high maintenance costs. It has a reputation for lower maintenance costs for people who have a tight budget.

Know more: 5.7 Hemi VS. 5.9 Magnum: Which One Is The Best?

The 6.7 Cummins, while powerful, tends to have higher maintenance costs. Therefore, it is a choice for those willing to invest in consistent upkeep for prolonged durability.

6.4 Hemi Horsepower

Towing Capacity

The 6.4 Hemi is suitable for drivers with moderate towing needs, such as hauling trailers or smaller loads. It’s because it offers a respectable towing capacity of up to 17,730 lbs.

Surpassing its counterpart, the 6.7 Cummins has an impressive towing capacity of up to 19,980 lbs. So, it is the preferred choice for heavy-duty towing tasks.

Payload Capacity

The 6.4 Hemi supports a payload capacity of up to 4,000 lbs, making it an ideal option for those who frequently carry heavier loads within the vehicle.

While slightly lower, the 6.7 Cummins still offers a substantial payload capacity of up to 3,140 lbs, catering to various hauling needs.

6.7 Cummins Reliability

Ride Quality

Known for providing a smoother and quieter ride, the 6.4 Hemi prioritizes a comfortable driving experience for those who value a tranquil journey.

In contrast, the 6.7 Cummins might offer a rougher and louder ride, appealing to drivers who prioritize the engine’s raw power over a serene driving experience.

Ideal For

Ideal for individuals looking for a balance between power and affordability, the 6.4 Hemi suits a wide range of drivers, from daily commuters to occasional haulers.

Tailored for those who demand top-tier towing capabilities and are willing to invest in a robust engine, the 6.7 Cummins caters to heavy-duty tasks and enthusiasts who prioritize power over fuel efficiency.

Know more: Cummins X15 VS. DD15 Engine

Is the Ram 6.4 Hemi a reliable engine?

Yes, the Ram 6.4 Hemi is known for its reliability. With a reputation for consistent performance and durability, it’s a solid choice for those seeking a dependable engine in their Ram trucks.

Why is the 6.7 Cummins the best?

The 6.7 Cummins is considered the best for its exceptional towing capabilities, robust torque, and fuel efficiency. It’s a powerhouse designed to handle heavy-duty tasks with ease.

Which 6.7 Cummins to avoid?

It’s advisable to avoid the early model years of the 6.7 Cummins (2007-2009) due to potential emission system issues. Opt for later models for improved reliability and performance.

Conclusion

I assure you this comprehensive blog will not involve you in the 6.4 Hemi vs. 6.7 Cummins debate anymore.

But again, the choice between the Ram 6.4 Hemi and the 6.7 Cummins ultimately depends on your specific needs and preferences.

The 6.4 Hemi offers a reliable and powerful option for everyday driving, while the 6.7 Cummins excels at heavy-duty tasks with its towing prowess.

Consider your priorities, whether it’s power, efficiency, or versatility, to make the best decision for your driving experience.

Andy Kilmer

Andy Kilmer

Meet Andy Kilmar, the Mechanic with a Pen

Andy Kilmar knows cars inside out after working on them for 11 years. Now, he's sharing his car secrets on a blog. He wants everyone to understand cars better, so he writes in a fun way with lots of tips. Andy's here to make cars less confusing and more exciting for everyone. Join him on his blog adventure where he makes cars easy to love and understand.

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