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Called the W22D and W20D, the 22,000 and 20,500 lb. GVWR diesel-powered chassis will now give RV buyers more new choices for the platforms that have become known for their exceptional ride, handling and performance. The W20D made its debut at the National RV Trade Show in Louisville this week. Two major motorhome manufacturers also displayed models built on the W20D: the Itasca Sunstar and the all-new Four Winds Serrano, both with floorplans in the 32-foot range. This evolution of the W20/W22 gas platforms marks the latest appearance of a Navistar MaxxForce engine on the motorhome scene. The MaxxForce 7, a 230 horsepower 6.4L V8 powerplant that puts out a hefty 620 lb.-ft. of torque to provide exceptional pulling power while achieving superior performance, reliability and fuel economy. Navistar also touts the MaxxForce 7 as a quiet diesel designed to greatly reduce the noise and vibration of the engine, providing an exceptional driving experience for the RV owner. The turbo with charge-air cooler is tuned to reduce noise, improve fuel economy and make MaxxForce 7-powered vehicles responsive and easier to drive. The MaxxForce 7 will provide a True Diesel emissions solution for 2010 that uses only diesel fuel, not both diesel and urea as required by SCR emissions control. Instead, advanced EGR and proprietary 'In-Cylinder' technology is used to meet 2010 emissions standards without additional after-treatment or negative impact on fuel economy.  directories of Free campgrounds The most comprehensive guides to free and inexpensive campgrounds in the East and West -- "must-haves" for budget-minded RVers. Save $5 by buying both East and West editions together. Learn more or order. Top of Page Get your FREE RV Travel Newsletter every week - sign up now.
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