My dad bought a 1995 Mazda Miata for a midlift crisis car. I've driven it a few times. It's pretty nice for fun jogs around the neighborhood, but nothing I want to drive for long distances.
I think that if a car started out turbo charged, than you could get larger turbos. If it wasn't it would stay naturally aspirated. I started with a Miata on my game, and its not bad, but not that great. It's a good begining car, but nothing I would stay with through out the game.
For FF cars I would launch at something like 3-4k, RR 4-6k, and AWD 6-7k. Although I don't work much with the 400m times and launches.