Technically none but it depends how strictly I play the game.
The Cinq isn't on there but the Seicento sporting is (it's basically the same car but with a facelift and a different name) and is rated at 3.5 stars
They do have the MR2 listed but it's the mk3 (5 stars x 2).
Assuming that I can get away with both of those then my total score is 13.5 which isn't too great but as I still own all three cars my 'current' score must be a contender for one of the highest here