How does this work


I dont understand your question or what you are asking about. What is your issue/concern?

Well I think the person is hacking because how is the car running without fuel and there is no engine run. Plus it does well over 200mph

There isn’t any “hacking” in BeamNG. There are many ways to go well over 200 mph in this game. Having no fuel or engine sounds could be an issue with him not syncing his car after tuning it OR just using slow mo/ high speed or using JATO rockets on his car. Nothing this person is doing is wrong, it is what the game is made for " testing cars, building them, doing fun stuff"