What's the top speed on your car?

[MiracleMax]

Originally posted by jimberg:
The mass of your vehicle will remain constant.

I was under the assumption that mass increased as velocity increased and this ties in with the theory of relativity (all joking aside), hence the super destructive power of meteors, asteriods, ect

but I digress

I can see where drag/friction limits top speed, and the relativistic effects of accelerating the mass from one velocity to another would support the statement that mass is a limiting factor,

however it seems to me that the speed attainable by most if not all vehicles niether have the mass or the speed to make mass by itself a consideration in limiting the top speed of the vehicle (hope that sounds right?) and aerodynamic forces (drag/friction) ultimately play the greatest role in limiting the top speed of a vehicle?