
In early June, BMW M workshop manager Hans Rahn revealed the next M5 will adopt a plug-in hybrid powertrain based on the S68 engine. This twin-turbo 4.4-liter V8 is already available in the facelifted X7 and the new 7 Series, with the production-ready XM to follow before the year’s end. As a reminder the super sedan will be a PHEV, a prototype has been spotted up close with "Electrified Vehicle" stickers on its front doors and rear bumper.