Those times they obtain are done in a way that's very heavy on the cars, and would be the best they acheived out of a *lot* of attempts. Don't worry if you can't match it. If you want to know if your car is for some reason down on power, see what your top speed is, and how it compares to the claims/road tests.
2.5-16v 1990 90,000m Astral Silver
2.0E 8v 1986 107,000m Black