i dont understand because its not like the battery is recieving energy from its own source, the electricity that the battery gets is essentially produced by the gasoline in the tank, so the gasoline is providing energy to the motor and electricity to charge up the battery. so if the power of the electric motor and the gasoling motor is being drawn from the gas in the tank how is it that a car can go so much further on the same amount of gas as compared to a normal car?

its for a touring car, 2 parts i guess one is what parts to upgrade(motor, battery, lighter parts etc) , the 2nd is what tuning (things like height, camber, spring tension, toe in/out,aerodynamics even?)
Im new to rc but have raced cars before and keen to try it for a bit of fun.

Would it be feasible to take a motor out of a retired train car, hook it up with a matching inverter and use it as the drivetrain for a car?