The Peugeot 3008 HYbrid 4, BMW i8, Audi e-Tron, Porsche 918 Spyder are all upcoming plug-in AWD hybrids with an engine and motor(s) powering separate ends of the car, at prices ranging from expensive to $845,000. The Audi A1 e-Tron concept EV has a Wankel engine as a range-extending generator, though there's been no…