That's probably a quick way to do it, but considering that using a miller cycle means we're going to want the turbo version of the engine, that alone is going to cost like $4k on Fords end. Add a 100kW+ generator with the power electronics to charge while driving, fuel system, exhaust system and cooling system, and we're probably approaching $10k upcharge for the customer.

Gotta remove a whole lot of batteries from that car to make it cost competitive again. Realistically, with an engine this powerful, we can probably cut down to like 30kWh of total battery capacity, which gets us back to where we started financially. And 30 kWh is enough to drive 70 miles all electric, which should pretty much should cover most daily use for people who charge at home.

Now, the questions if we can do that cheaper with a much smaller engine. Ford has a 1 liter inline 3 in the Fiesta and Focus that makes half as much power. Should be enough...