Jet engines run on Kerosene (Parafin) not petrol so the car (if it started) would run like a bag of spanners.
You could fit a vaporiser to the exhaust manifold vaporise the paraffin. It would then run on it when warmed up, like a TVO (tractor vaporising oil) tractor, state of the art c1940.
Okay, they were temperamental things, and only worked properly in ideal conditions. Modern fuel systems and high compression engines would be most unhappy, but in theory it should work.
Diesel engines must have seemed a Godsend to tractor operators back then.