Land Rover's redesigned 2013 Range Rover SUV borrows a bit of the edge of its smallest sibling, the Evoque. Range Rover's flagship retains its venerable flat-roof, big-box shape but features an Evoque-like front fascia. The most significant change for the 2013 Range Rover is largely hidden but plays a huge role in enhancing fuel economy and handling. Land Rover says the SUV’s all-aluminum unibody structure -- a first for an SUV -- is 39 percent lighter than the steel body it replaces and helps reduce weight by 700 pounds. It goes on sale in the United States in December, with prices and specifications to be released next month when it formally debuts at the Paris auto show.