@James Cane - Re: and the electricity?
Hi James, I downvoted. I explain why.
Firstly, as Graham pointed out, you failed to take into account transmission losses etc. Even charging losses local to the vehicle are quite significant.
Secondly, it's not all about efficiency. Sure, ICE engines aren't massively efficient, we know that, that's why we'd like to replace them all with EV's - WHEN THE GRID IS CLEAN.
At the moment, ICE engines are wasting petrol and diesel. Recent fuel prices confirm we have plenty of that for a while. However, inefficiencies in an EV waste electricity...wasting that means burning more coal than you need as I outlined above.
The biggest inefficiency in an EV, as supporters always try and gloss over, is the heater. The irony is, all that waste heat in an ICE car isn't waste...it can be used. It heats the cold, it defrosts the windscreen and saves you having to sit there in an anorak on a cold day.
Simply using the heater in the same way you would on an ICE car can reduce EV range from ~100 miles in Summer to ~60 miles in winter. That's a 40% reduction.
EV manufacturers combat this by allowing pre-heating when connected to the charging cable. Your car gets heated by using electricity directly from the grid, not the battery. This isn't taken into account on any efficiency figures and would totally void figures like the 30mpg equivalent quoted by somebody above. In cars like the leaf they are trying heat pumps, seat heaters and other techniques to help the situation but, ultimately, it uses a shed load of electricity to keep the car comfortable for its occupants whereas an ICE car is effectively heated at no additional cost.