The calculations and research was done several years ago and at 90% engine efficiency and electricity at 70% at worst with 30% lost in lines the output is still more efficient for electric vehicles. That research was done using coal power and improves CO2 emissions with sustainable power. Nuke plants are the most ineficient as from all the uranium mined only 0.7% is usable or compatible for enriching which is U235 while the 99.3% U238 goes to waste, leaks into the environment as been discovered all over the world now and nothing can be done to stop cheap steel canisters rusting and deteriorating. Gas power makes Electric CO2 friendlier while Wind and Thermal the ultimate clean energy.

I just look at Remote control cars and say why not scale up with better batteries eg: BP, Exxon and other Oil Monopolies have stashed away patents for battery architectures/chemistry that is 100-1000 times better than currently used in the best smart phones!

Toyota won the JTP endurance race almost 4 years ago with a seriously awesome Supra hybrid also so this concept will be interesting to see what it transpires eventually