According to insiders BMW is working on an X4 - a baby X6 if you will. It’s still un-named but insiders say that the SAC, SAV, SUV or whatever you want to call it, will borrow styling from the X6. Sources say that it will be a tall five-door fastback with all-wheel-drive and rear-wheel-drive available. Makes sense since we just heard the X1 will be available with rear-wheel-drive as well.