Prototypes of a new X6 model with a unique front bumper, featuring the aggressive styling of BMW’s M cars, were spotted testing at the Nurburging recently. Initially, these prototypes were thought to be running the same twin-turbo 4.4-litre V8 engine as the standard xDrive50i models but with extra boost, however latest reports indicate that test vehicles could be featuring a advanced hybrid system designed under BMW’s F1 program.
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