Power Efficiencies of Cars

Some interesting facts about car efficiencies... Last article is the best for you nerdy types :)

Modern Natural Gas Plants close to 50-60% efficient…
Internal Combustion Engine 20 and 25% (not counting fuel transportation costs)…
Diesel Engine 40% (not counting fuel transportation costs)
Electric Motor 95%

http://www.naturalgas.org/overview/uses_eletrical.asp
http://encarta.msn.com/encyclopedia_761553622/internal-combustion_engine.html

#Great article comparing and constrasting power efficiency application on cars
http://www.evworld.com/library/Tesla_21centuryEV.pdf

Point of contention with some of this… All calculations are comparing vs pretty nice/friendly natural gas, where coal introduces less efficient power. Still no matter what, seems like electric is going to be efficiency win over even hybrid.