I think it's a question if they wanna be able to do 30-40 km range pure electric or just use it as a performance enhancer. For a 911 I would hope for the latter - the smallest possible battery placed in the front with 400nm /136HP on the drivetrain for boost if needed - then charged again automatically. Maybe you can build a mode where it helps coasting to reach a crazy number for the first 100 km average consumption for marketing purposes. Basically a 4S with nearly 600 HP and a Turbo with nearly 800hp. I would buy it ! A all electric 911 I would not....