Cummins engines are well-known for their power, durability, and reliability in trucks and commercial vehicles. Among them, the 6.7L Cummins engine is one of the most popular. But many truck enthusiasts and buyers often ask: is the 6.7 Cummins a V8 or a V6? Let’s clarify.

1. Engine Configuration

The 6.7 Cummins is a straight-six (inline-6) engine, not a V6 or V8. This means:

• All six cylinders are arranged in a single line.

• This design contributes to better balance, smoother operation, and long-term durability compared to V-type engines.

The inline-six layout has been a hallmark of Cummins diesel engines for decades, combining high torque output with simplicity and proven reliability.

2. Power and Performance

The 6.7L Cummins engine is known for its exceptional torque and horsepower, making it ideal for:

• Heavy-duty pickups (Ram 2500/3500)

• Commercial trucks

• Industrial and off-road equipment

Typical output ranges:

• 350–400+ horsepower

• 800–1,000 lb-ft of torque

This torque-centric design is ideal for towing, hauling, and demanding diesel applications.

3. Advantages of an Inline-Six Cummins

• Durability: Fewer moving parts than a V8, leading to long engine life.

• Fuel Efficiency: Smooth power delivery helps improve fuel economy.

• Towing Capability: High low-end torque makes it perfect for heavy loads.

• Maintenance: Easier to service than many V-type engines.

4. Final Thoughts

The 6.7 Cummins is not a V6 or V8, but an inline-six engine, a design that has made Cummins legendary in the diesel world. If you’re looking for reliability, towing power, and long-term durability, the 6.7L Cummins is an excellent choice.