Hybrid cars let you operate IC engines at fairly high efficiency depending on setups but you now have to deal the overhead of charging batteries for both setups.
Also, if you want total efficiency in terms of C02 then you need to consider. Gasoline takes a lot of energy to extract, refine into a usable state, and transfer around the world. On the other hand hydrocarbons extract energy from hydrogen bonds not just carbon bonds so they produce less C02 per BTU.
Net result electric cars backed by coal power still win vs IC, but not by as much as you might think.
PS: You can also use turbines in hybrid car which would boost it's efficiency even more. But, you can also produce very cheap solar power which once again shifts things back to electricity.
Also, if you want total efficiency in terms of C02 then you need to consider. Gasoline takes a lot of energy to extract, refine into a usable state, and transfer around the world. On the other hand hydrocarbons extract energy from hydrogen bonds not just carbon bonds so they produce less C02 per BTU.
Net result electric cars backed by coal power still win vs IC, but not by as much as you might think.
PS: You can also use turbines in hybrid car which would boost it's efficiency even more. But, you can also produce very cheap solar power which once again shifts things back to electricity.