[guimarin]

This is true, but centralized power generation is a lot more efficient then creating the power individually at the point of consumption like ICE cars do today. I believe that an ICE motor is something like 30% fuel efficient, Electric something like 80-90% and a combined cycle blah blah gas turbine is more like 60-70%. So no, it won't be the full 14% but it won't be a few points either, probably safe to say 5-10% reduction.

[0xbear]

That's not safe to say either. I've read that EVs take more energy to manufacture as well.

[guimarin]

A very good heuristic is to compare their total $ costs for purchase and use, and then think about what sorts of externalities that doesn't cover. I've found over and over again that $ cost pretty much equals energy and therefore pollution cost, less the externalities. But the externalities are really super important, and of course, engine efficiencies and where in the cycle the energy is liberated from it's chemical bonds is important.