BMW Z6 wallpaper, Photos, pics and images gallery. The BMW Z6 will be about the same size as the existing 6 Series and will feature mechanical components from the 6 and 5 Series. The German automaker apparently has decided on a front-engine format, rather than a mid-engine design, for the Z6. The car will likely come with a range of engines, including the new 3.0-liter twin-turbocharged I-6 and an updated version of the M5's 5.0-liter V10. Channeling power to the rear wheels will be a new double-clutch sequential manual gearbox.