This means that if it is estimated that 1 liter of ethanol contains 10 kWh of energysustainergy wrote: Source?
What does a 15% return mean?
A heat engine, especially a "V12" will easily consume 10 to 15 liters per 100km in town (Madam's cars, M segment gasoline sedans commonly consumed 16 liters per 100km in traffic jams ...)
So 15 liters represent 150 kWh of energy when an electric car like Madame's 106 currently consumes 20kWh for the same trips ...
The big advantage of the electric car is to consume only the necessary energy because the engine never turns for nothing, like a petrol engine that turns during a stop at a red light ...
The figure of 15% is then very realistic, the real maximum efficiency of a heat engine (road journey at 80 / 90kmh) can hardly exceed 35%, the rest is wasted in waste heat, noise, ...
Continuing to use fuel in internal combustion engines is heresy due to efficiency AND pollution, the last point being unacceptable because INSOLUBLE.