2006 Polaris Ranger 4x4, RNOThe RANGER XP takes the 4 x 4 off-road utility vehicle to the next level. RANGER XP is powered by a liquid-cooled Polaris 700 twin-cylinder EFI engine pumping out 40 hp the highest allowed by law. Its specs shatter the status quo and include a 50 mph top speed and 1750 lb. towing capacity. It s the first utility vehicle with Electronic Fuel Injection for fast starts even in extreme temperatures and altitudes.