I think it will be a nice addition to have a hybrid car in the game, maybe a Prius like car would be great, or we could just take one of the official cars and slap in a hybrid version. Also, the Hirochi ESBR4 is just too fast maybe lower the speed down? Have a nice day!
Oh btw there is also real hybrid cars like https://www.beamng.com/resources/sbr4-hybrid.2866/, https://www.beamng.com/resources/hybrid-pessima.2637/ and https://www.beamng.com/resources/sunburst-hybrid.2409/
https://www.beamng.com/resources/etk800-hybrid.6061/ https://www.beamng.com/resources/hybrid-citybus.5502/