Disclaimers

Date Published: January 23, 2026 | Last Modified: 1 hour ago | 4 minute read by Jeremy Letourneau at Redwater Dodge

The I6 vs. V8 Deep Dive

Why the Inline-6 is Outperforming the Traditional V8

For decades, the rumble of a V8 was the gold standard for power in the RAM and Jeep lineups. However, engineering doesn't stand still. Jeremy at Redwater Dodge, joins us to discuss the massive shift in buyer preference toward the Inline-6 (I6) engine. Whether you’re looking at the legendary Cummins Diesel or the new high-output gas variants, the I6 is proving that more cylinders aren't always better.


The Physics of Smoothness

One of the first things drivers notice when switching from a V8 to an I6 is the lack of "chatter." A V8 engine requires heavy counterweights on the crankshaft to stay balanced because of its "V" configuration. In contrast, an I6 is naturally balanced. The cylinders move in pairs, effectively canceling out vibrations. This results in a smoother idle and a refined driving experience, whether you're cruising on the highway or idling at a job site.


Torque Where It Counts

In the world of towing and hauling, horsepower is flashy, but torque is the workhorse. The I6 design inherently allows for a longer "stroke," which generates stronger low-end torque. For CDJR owners, this means better "get-up-and-go" when pulling a trailer. You don’t have to wait for the RPMs to scream before you feel the power; it’s right there at the bottom of the pedal.


Efficiency Without Compromise

With fewer moving parts and a lighter overall weight, the I6 is a masterclass in efficiency. By reducing the internal friction found in more complex V-engines, the I6 delivers better fuel economy, especially in diesel configurations. This isn't just about saving a few cents at the pump; it’s about extending your range on long hauls and lowering the total cost of ownership.


Built to Last: The Simplicity Factor

Jeremy at Redwater Dodge puts it best: "Less things to go wrong." A V8 has two cylinder heads, two exhaust manifolds, and a more complex valvetrain. An I6 simplifies this with one head and one manifold. This "simpler" design doesn't mean "basic"—it means streamlined. It allows for more engine bay space, easier maintenance, and fewer failure points over the life of the vehicle.

Frequently Asked Questions


Q1: Why is an Inline-6 engine smoother than a V8?

A1: The I6 is inherently balanced. Because the pistons move in a symmetrical pattern, they naturally cancel out primary and secondary vibrations without the need for heavy balance shafts.


Q2: Does an I6 have more towing capacity than a V8?

A2: In many modern CDJR configurations, yes. The I6 often provides superior low-end torque, which is the primary force needed to move heavy loads from a standstill, often resulting in higher payload and towing ratings.


Q3: Is the I6 more fuel-efficient?

A3: Generally, yes. Due to reduced internal friction and a lighter engine block, the I6 can achieve better MPG (especially in diesel or twin-turbo gas formats) compared to a traditional naturally aspirated V8. 


Q4: Is it true that I6 engines last longer?

A4: Because the design is simpler with fewer moving parts (one cylinder head vs. two), there are fewer gaskets and components that can fail, often leading to a longer lifespan and lower maintenance costs.


Q5: How does the weight of an I6 affect handling?

A5: An I6 is typically lighter and narrower than a V8. This improves the vehicle’s weight distribution, leading to more responsive steering and better overall balance when cornering.


Q6: Why is the I6 better for "daily driving"?

A6: The combination of low-end torque for city stop-and-go traffic and the lack of vibration makes it a much more comfortable "civilized" engine for commuting.


Q7: Does the I6 offer a better "power-to-weight" ratio?

A7: Yes. By shedding the bulk of a V-block, the I6 allows the truck to use its power more effectively, improving both acceleration and braking performance.


Q8: What is "natural balance" in an engine?

A8: Natural balance occurs when the firing order and piston movement of an engine naturally counteract each other's forces, requiring less mechanical intervention to keep the engine from shaking.


Q9: Why do diesel enthusiasts prefer the I6?

A9: The I6 layout is the "gold standard" for diesels (like the Cummins) because it allows for massive reinforced bearings and a robust crankshaft, which are essential for handling high-compression combustion.


Q10: Is the I6 more expensive to maintain?

A10: Actually, it’s often the opposite. With more space in the engine bay and fewer components to service, labor times and parts costs can be lower over the long term.


Q11: Does the I6 sound different than a V8?

A11: Yes. While it lacks the "thumping" lope of a V8, it offers a mechanical, high-tech "whir" or "growl" that many modern drivers find more sophisticated.

Jeremy Letourneau -- Sales Associate at Redwater Dodge