PACCAR PX-9 Overview

PX-9 Engine LargeHeavy & Medium Duty
Class 8, 7 & 6

2 Years or 250,000 Miles
Base Warranty


lb-ft of Torque

8.9 Liters

Spec Sheet


Reliability & Durability



Fuel Efficiency

High Pressure Common Rail Fuel System

The Common Rail Fuel System maintains high injection pressure regardless of engine speed. The precise control contributes to performance efficiency and lower fuel consumption. This means complete fuel combustion and lower emission creation and helps the engine run cleaner, quieter and stronger.

High Pressure

Selective Catalytic Reduction (SCR) Aftertreatment System

The SCR aftertreatment system is a reliable, proven method for reducing NOx.

SCR System


Electronic Control Module

Electronic Control Module accurately controls all engine functions for optimum performance and economy. The ECM precisely controls air, fuel, and aftertreament systems so no unnecessary work is performed and fuel consumption is used for your work.

Electronic Control Module






Explore the Outstanding Torque Curve

1,250 lb-ft of peak torque provides outstanding power for startability, gradeability, acceleration and moving heavy loads.

PX-9 Torque

Explore the Power Curve

Top power rating of 450 horsepower for superior weight to horsepower ratio.

PX-9 Horsepower

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