A new gen makes its debut, powered by the same twin-turbo V-8 as in the X6. The topline again will have a 12-cylinder, but with twin turbos. Both engines will send power to the rear wheels through an 8-sp gearbox. Styling evokes trends from newer BMW vehicles, with a more conventional trunk design. Among the many technical advances are four-wheel steering and new versions of iDrive and other systems.