Cummins X15 Technical Specs: Everything You Need to Know

Cummins X15 Technical Specs
Cummins X15

Cummins X15

Specifications & Technical Data (2019-2026)

The Cummins X15 is a legendary heavy-duty inline six-cylinder diesel engine, in production since 2019 and engineered to power the world’s most demanding commercial applications. With a massive 14.9-liter displacement, this high-performance powerplant delivers class-leading torque and horsepower, built for uncompromising durability and long service life under extreme heavy loads. Weighing in at 1,436 kg (3,166 lbs), the X15 is optimized for rugged, continuous operation, generating a peak torque of 2,779 Nm (2,050 lb-ft) to deliver exceptional low-end pulling power for steep grades, heavy hauls, and high-torque vocational tasks. Its power output ranges from a robust 336 kW (450 hp) to a maximum of 503 kW (605 hp), all achieved at a rated engine speed of 2,100 RPM, balancing responsive performance with efficient operation. Designed from the ground up for industry-leading reliability and fuel efficiency, the Cummins X15 series is the trusted power solution for Class 8 heavy-duty trucks, construction equipment, and a wide range of high-intensity industrial applications.

Technical specs - X15 Cummins

Specification

Notice: All data presented here has been carefully verified by the LECTURA Specs team of experts. Despite our best efforts, incomplete information or minor errors may still occur. If you notice any inaccuracies or have suggestions for revisions, please feel free to contact our team.

No. of cylinders

6

Layout

Inline

max. Power

503 kW

Max. torque

2779 Nm

Aspiration

T

Model series

X

Displacement

14.9 l

min. Power

336 kW

RPM

2100

Tier Max.

V / Tier 4f

Weight

1436 kg

Key Highlights

  • Built on Cummins’ proven legacy of reliability and uptime, the X15 delivers improved greenhouse gas efficiency and superior fuel economy.
  • Designed and manufactured in North America, the engine fully complies with strict EPA and CARB emissions regulations.
  • Delivers powerful performance with ratings up to 605 hp and 2,050 lb-ft of torque for heavy‑duty applications.
  • Features a belt‑driven high‑output 48‑volt alternator and advanced aftertreatment heater system to meet stringent emission standards.
  • Offers fully optimized powertrain integration with Endurant and Cummins‑Meritor components for smoother drivability and better fuel efficiency.
Cummins X15 Engine

For further technical specifications including emission tier minimums, cooling system type, bore and stroke measurements, and alternative model designations, please refer to the complete technical specs sheet.

Download datasheets (PDF)

Spare parts & Components

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Spare parts & Components

To sum up, the Cummins X15 stands out as a powerful, reliable, and highly capable heavy-duty diesel engine with impressive technical specifications. From its displacement and cylinder configuration to its torque, power output, and structural design, every aspect is engineered to meet the demands of tough industrial and commercial applications. Whether you are an owner, operator, or dealer, understanding these key specs helps you better evaluate performance, choose the right parts, and maintain the engine for long-term durability. For more in-depth details, always refer to the full technical datasheet to ensure accurate and safe operation.

Note: All data and specifications mentioned above are sourced from the internet and for reference only.

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Kingsley

Hi, I’m Kingsley, the author of this post. With over 30 years of experience in manufacturing and supplying excavator parts, we serve customers in more than 50 countries. We provide reliable, high-quality components for construction, mining, agriculture, and heavy equipment applications. If you need durable excavator parts or a free quote, feel free to contact us.

Picture of Kingsley

Kingsley

Hi, I’m Kingsley, the author of this post. With over 30 years of experience in manufacturing and supplying excavator parts, we serve customers in more than 50 countries. We provide reliable, high-quality components for construction, mining, agriculture, and heavy equipment applications. If you need durable excavator parts or a free quote, feel free to contact us.