Car Magazine has put up some renders and speculation over on their site:
http://www.carmagazine.co.uk/spy-shots/bmw/new-2020-bmw-m3-codenamed-g80-revealed/
The speculate a 48 volt electrical system, electrically spooled turbos, water injection and hybrid on demand AWD system.
http://www.carmagazine.co.uk/spy-shots/bmw/new-2020-bmw-m3-codenamed-g80-revealed/
The speculate a 48 volt electrical system, electrically spooled turbos, water injection and hybrid on demand AWD system.