Cummins X15 Heavy-Duty Engines

The Cummins X15 Performance and X15 Efficiency Series engines provide lower fuel consumption come factor-ready for Over-the-Air engine programming.

X15 Performance Series
X15 Performance Series
Cumminslo 10108212

Cummins Inc. has revealed the next-generation 15-L X15 heavy-duty engine.

  • Rated at 400-605 hp (298.28-451.15 kW) 
  • Ready to exceed EPA 2017 greenhouse gas (GHG) and fuel-efficiency standards
  • Provides lower fuel consumption, extended service intervals and enhanced performance 
  • Incorporates ADEPT, SmartCoast and Predictive Cruise Control (PCC) functions to gain a further 3% fuel economy improvement
  • Features 400 hp (298.28 kW) braking power at 1,300 rpm
  • Includes optimized compression ratio, air handling system and cam profile to increase both fuel efficiency and performance capability
  • Optimized cam profile minimizes inherent parasitic loss during combustion, increasing thermal efficiency and providing high compression ratio
  • Cummins VGT Turbo and XPI fuel system improve engine response and reduce fuel consumption
  • Minimized friction losses throughout, including water pump, gear train, lube system, piston and EGR provide additional efficiencies
  • Factory-ready to enable Over-the-Air (OTA) engine programming and customization when connected to a telematics system
  • Two configurations available, the X15 Performance Series and X15 Efficiency Series

X15 Performance Series

  • Rated at 485-605 hp (361.66-451.15 kW)
  • For heavy-haul, vocational and emergency vehicles
  • Upgraded high flow air-handling system gives faster pedal response for enhanced driveability at full payload and steep-gradient climbing
  • Peak torque of 2,050 lbs.-ft. (2779.43 Nm) is delivered across a very wide engine rpm range, so less shifting is needed and less fuel is used
  • Provides over 450 hp (335.57 kW) engine braking at just 1,500 rpm and up to 600 hp (447.42 kW) at 2,100 rpm

X15 Efficiency Series

  • For line-haul and regional-haul applications
  • Offers high level of fuel efficiency and payload productivity
  • Power rating range of 400-500 hp (298.28-372.85 kW) and up to 1,850 lbs.-ft. (2508.26 Nm) of peak torque available at 1,000 rpm
  • Delivers class-leading fuel economy when integrated with Cummins and Eaton SmartAdvantage Powertrain by precisely adjusting to grade, vehicle weight and driver input via throttle position


Request More Information
Fill out the form below to request more information about Cummins X15 Heavy-Duty Engines