The PACCAR MX-11 engine can be specified between 355 and 430 horsepower with up to 1,550 lb.-ft. of torque, while the larger PACCAR MX-13 engine has a range between 380 and 500 horsepower and up to 1,850 lb.-ft. of torque.

Torque curves vary, so depending on the application and terrain covered, it makes sense to select an 11-liter platform, drivers can’t tell the difference in power but fleet owners can tell the difference adding 400 more pounds of payload, that can mean additional concrete for a mixer.

Loading up to 66,000 pounds gross an 11-liter engine is ideal, for applications grossing between 66,000 and 80,000 pounds, the choice between 11- and 13-liter allows for a greater level of optimization.

Kenworth Truck, A PACCAR Company.

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