We have these big powerfull cars with 10.000 PS or something like this. But we don't get to hear one of the most awesome things about them: the sound when they start up. This would be something new. None of the RC games had such a thing. There was the turbo start, but that is just not the same.
To create a appropiate sound we need to answer a few questions:
What exactly powers the car?
Is it a "normal" engine?
Some kind of turbine? (The current high pitched sound hints at that.)
Or a unknown future technology?
Maybe a combination of this:https://youtu.be/_OymET8YGWc?t=17s
Or something completely different?
Or just don't do it at all?