People here are confused when you use the word efficient but you’re talking about specific power output. So power/displacement. So how much horsepower per cubic inch (or how much kW per litre etc)

I too found it amazing how American cars had such terrible specific outputs.

I wonder what the worst American V8 is of the malaise era?

This was going to happen with or without EV’s. The Chinese aren’t going to sit around and let foreign corporations run the show in any market.