X15 engine alternator

Features

Up to 4% better fuel efficiency

In the era of constantly rising fuel costs, you need an engine that gets more out of its diesel. The X15’s optimized components and systems contribute up to 4% improvement in fuel efficiency on the base engine while maintaining similar diesel exhaust fluid consumption (over the 2024 EPA X15™).

X15 Engine close up

Features

Weight neutral system

A sculpted engine block reduces engine weight and adds strength to the right places, offsetting the weight gain from the aftertreatment system, and resulting in a weight-neutral system that translates to higher payloads and more completed jobs.

X15 engine side view

Features

Up to 605 hp & 2,050 lb-ft of torque

To overcome the challenges scattered across tomorrow's road, you need power – and lots of it. Enter the 2027 X15 from Cummins. With up to 605 horsepower and 2,050 lb-ft of torque, the X15 has the power to rise above any obstacles in its way.

Getting to know the X15™

Cummins X15 Engine
Cummins X15 Engine
Dive deeper into the X15

Learn about the X15’s 25+ year legacy in the North American Heavy-Duty truck market and how Cummins plans to carry that legacy forward with the 2027 iteration of the X15 platform.

We also explore changes within the platform that provide additional value and establish the X15 as a trusted, simple, and proven design.

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