Sep 1, 2006 12:00 PM

Kenworth will install the new Paccar PX-6 and PX-8 medium-duty engines in Kenworth's conventional Class 6 and 7 vehicles beginning in January 2007.

The 6.7-liter PX-6 engine, which will be offered in both Class 6 and Class 7 configurations, will be available in ratings from 200 to 325 horsepower and 520 to 750 ft-lb of torque. This engine has a two-year warranty with unlimited miles.

The 8.3-liter PX-8 engine will be provided in ratings from 240 to 330 hp and a torque range of 660 to 1,000 ft-lb in addition to a 360-hp version for emergency vehicles. The engine will be available in Class 7 and the tandem-axle Kenworth T300. The PX-8 has a two-year, 250,000-mile warranty.