Superior off-road ability, available in short- or long-wheelbase versions, choice of soft top or hard top, upscale navigation system.The 2007 Jeep Wranglers body structure is stiffer than before and works in conjunction with enhanced suspension and steering tuning to provide a more refined on-road experience. Additional sound insulation and new top designs reduce wind noise. For power, Jeep has replaced the previous inline six-cylinder engine with a new 3.8-liter 202-horsepower V6. Its more powerful than the old engine, but it also must move more weight; the Wrangler Unlimited weighs in at about 4300 pounds, more than 1000 pounds heavier than last years regular Wrangler.