Probably steam.
Steam powered the first reliable streetcars.
Depends on your definition of "car" The first self-propelled vehicle was in 1769-- steam engine. The first internal combustion powered car was 1807..Hydrogen powered. The first gasoline IC car was 1886. First electric 1900. Seems we have come full-circle, the next reliable, available fuel will be hydrogen.
electricity
Electricity
the first solar powered car , also known as the "sunmobile"
Karl Benz was the man who invented the first fuel-powered car in 1885
steam
the solar powered car was invented by Alfred Pandori 1985
Ferdinand Verbiest invented the first car in 1672. It was the first car ever invented and it was powered by steam.
Karl Benz invented the first petrol-powered car. It ran for the first time on New Year's Eve 1879.
Benz.
Steam