Cars and bikes have the highest top-speed and the best acceleration and braking.
V 1.1: gave cars the behavior of the bullet, flash, hotknife and sultan. Bikes behave like the NRG500.
Don't hesistate to check out my other mods:
GTA III:
Fast unsinking Liberty cars http://www.gtagarage.com/mods/show.php?id=13194
Spring weather http://www.gtagarage.com/mods/show.php?id=13196
The invincible gangster killer http://www.gtagarage.com/mods/show.php?id=15777
GTA Vice City:
Vicious speed unsinkable vehicles http://www.gtagarage.com/mods/show.php?id=13193