Where does the energy go?

This is a question for all and sundry, but mostly for NPR's Science Friday talk show.

Has anyone performed comprehensive "wellhead-to-pavement" energy and carbon audits for automobiles in conventional, PHEV and straight EV modes? How do they stck up for coal generated electricity and natural gas generated electricity?

I have an impression that a Toyota Rav4 EV powered by the dirtiest coal plant in the US is still cleaner than the same vehicle of conventional gasoline power. Am I anywhere near the mark on this?

Also, what is the impact, per mile, of battery manufacture?

Love and curiosity,
Stephen