I'd love to see this car
The best option at the moment for propelling anything is solar panels on light high flying aircraft which can fly high enough to get a constant supply of sunlight, and where air resistance is thinner.
Everything else loses energy. You only start with so much fuel with a full tank of petrol. When you start to move, some of it is converted to kinetic energy, causing the car to move. When it's used, that's it, it's lost. Well it isn't exactly, there are many ways it's let off, for example the wind caused by the car moving, the heat generated by the engine. Yes, you can capture some of it and charge a battery for a while but ever wonder why a car with a battery needs to be running for the battery to keep working? It's because it can only hold so much power and you're actually using some of that fuel to power the battery, even though it's being captured from the function of the engine in the first place.