Grandprix 3
http://en.wikipedia.org/wiki/Grand_Prix_3
It run 233 Mhz Pentium so speed wont be problem

Stunts
http://en.wikipedia.org/wiki/Stunts_(video_game)
It run 33Mhz 486 so speed wont be problem.

Ski or Die
http://en.wikipedia.org/wiki/Ski_or_Die

Carmageddon 1, 2 or 3(TDR 2000)
http://en.wikipedia.org/wiki/Carmageddon
Even TDR2000 needs only 233Mhz

Frontier: First Encounters
http://en.wikipedia.org/wiki/Frontier:_First_Encounters
It needs only 33Mhz on PC so speed wont be problem

Civilization III
I have runned this on Mac OS9 machine with 400Mhz so speed wont be problem.