In less than two years your boy will be eligible for military service. Let him start to grow up as a man. Quit nannying him. It's about time he learned how to drive a real car. If you're still concerned, get him a Crossfire with an auto transmission. That'll lessen the urge to punch it all the time. But for Chris' sake, let him get the car. He'll probably spend every weekend washing and waxing it.
OR, get him a Ford Focus that'll fold up the first time that someone backs into him in the parking lot at WalMart.
But quit whimpering and whining about a "fast car". They're ALL fast, some just get up to "Fast" faster.
By the sounds of your boy's preferences, you're about to finally have a man in the family. Be happy!