Right, but all of that info could be fed to a computer and have it displayed on a main screen. So basically make it look like the tesla. Make your rx8 a gas farting tesla that can in fact play crysis 3.
And I was not suggesting that you use a single pi. I was saying to use a pi as an interface between your car and your computer.
And I am not sure a pi is the right way to do that. I am not a big electronics maker person.
I know for a fact your various buttons can be controlled by your computer and all you would have to do is make a small program to control all of them which should be piss simple with linux.
As far as the data on the screen goes, I have an idea. I am sure it can be fed into your computer as well, and I am looking up how to do it.