"The Unlimited's box-section frame adds 10.0 inches to the standard Wrangler's wheelbase, extending it to 103.4 inches. There's also an additional five inches of rear overhang, which pulls its overall bumper-to-bumper dimension to 165.1 inches, or 15.0 more than the abbreviated model. The additional space is unequally apportioned in the interior. Leg and knee room in the back seat are expanded by just under two inches. But a whopping 13.0 inches is allotted to the area behind the rear seat. Cargo volume goes from 9 to 29 cubic feet. Out-of-sight cargo space has about doubled,..."

Car and Driver Magazine : Jeep Wrangler Unlimited : July/2004