Cummins ISX Engine

Cummins ISX15

Power 450 hp

Torque 1750 - 1850 lb-ft

Advanced technology in the ISX 15 engine ensures a larger “sweet spot” for better fuel economy due to effective use of direct drive, downshifting ability and optimized communication between transmission and engine. Fuel economy and performance improvement due to the Smart Torque 2 technology ability to sense grade, vehicle weight and operating gear while selecting appropriate torque for the job.


  • Improved fuel economy due to the Smart Advantage Powertrain with Smart Torque 2 (ST2) combination to ensure smooth shifting of the Eaton Fuller Advantage 10-Speed Automated Transmission
  • Guessproof, error-free shifting ensuring driving efficiency regardless of the driver
  • Cruising range at 1150 - 1240 rpm due to high torque delivery
  • 4 ratings available: 450 hp 1550/1750 lb-ft, 420 hp 1550/1750 lb-ft, 400 hp 1550/1750 lb-ft and 400 hp 1450/1650 lb-ft
  • Automatically enabled Vehicle Acceleration Management (VAM) feature assists with acceleration rate, assuring a more smooth and consistent acceleration
  • rate due to more efficient transitioning through the gearing system
  • Further improvements in fuel economy due to precision lubrication allowing a reduction in churning losses while increasing reliability, reducing overall
  • weight and eliminating the need for a cooler
  • Small-step technology built into engine ensures optimized shifting based on engine torque, grade and vehicle weight as well as throttle position