I thought of the weighting of points, and decided that top speed means more than just the fastest speed it'll go. Compare a car A with max speed 230mph and car B with max speed 250mph... Car B will get up to 230mph much faster than Car A. Higher top speed means that the car will get up to a higher speed faster.
And that isn't already included in the score with the 3 separate acceleration tests?
I tip my hat for the trouble you've gone through, excellent work. Personally I would tune the ranking a bit but everyone is able to do that themselves anyway by downloading the chart. I just added up all acceleration times and laptimes and ranked based on those ignoring the top speeds. Top 5 in order are Minolta, Audi R8 '01, R92CP, Sauber C9 and R89C, I think I agree with this list.