And the infrastructure for petroleum is very well established. Sucking it out of the ground, storage, transportation, refinement, storage, distribution, storage, etc. If you want to get really picky, you have to include the costs of maintaining the source of supply which is the Middle East for some countries and the cost of occasional spills, etc.
Petroleum has served us very well.
How a Mr Fusion and an electric motor? :)
I don't know. Maybe some chemical process that induces electricity in a coupled wire? A current produces a magnetic field — an electric motor. Again, you don't get anything for free so whatever pushes those electrons has to produce a lot of energy and it has to be controllable through some kind of a regulator. The next best thing is a storage device that drives the current in the wire and is charged from a source that is very efficient.
Well, the difference here is...I could probably build an experimental version of my proposal....mostly from a junkyard Prius.
The end result of your level of high-performance would be the HP of the powerplant, none of which has to weigh very much (another efficiency factor)
After all, the main power source for the propulsion motor would be the turbo-powerplant...not the batteries. Just like a locomotive.