From the Pixar site about that car (or at least the car that looks like that):
"Sally is a beautiful 2002 Porsche 911 from California who grew tired of life in the fast lane and made a new start in the town of Radiator Springs. Charming, intelligent and witty, she is the town attorney and the car most dedicated to preserving and reviving the town with the hopes that one day it will get 'back on the map'."
The car picture above is a remarkable copy of the CGI. Go to
http://adisney.go.com/disneypictures/cars/main.html choose gallery and scroll to the Porsche, then select her to see more.