[Petrochemicals (OP)]

I am assuming that a vehicle of given shape will have uniform wind resistance over different velocities. I know this to be somewhat incorrect due to Eddie's etc. Discounting the variables, what formula describes wind resistance? Some inverse of boyancy?

I realise I can Google it, but what is the most reliable generalised formulae?

[Kryptid]

Wikipedia actually has a page on this: https://en.wikipedia.org/wiki/Drag_equation

At subsonic speeds, a doubling of speed results in a four-fold increase in drag. This is no longer true once you enter the trans sonic zone. Drag increases faster than this rate once you approach or pass the sound barrier.

[Bored chemist]

On both experimental and theoretical grounds, the air resistance rises as the square of the speed (up to near the speed of sound.
If the car goes n times as fast it hits n times as much air, and  (which  would increase the load by a factor of n) and it also hits it n times faster (which increases the drag by another factor of n) so the overall increase in wind resistance is n squared.

[alancalverd]

In the laminar flow region, drag = ½ρC_dv²A where
ρ = air density
C_d = drag coefficient
v = speed and
A =  crosssection area

C_d is best determined experimentally but can be approximated by using weighted tabulated values for all the shapes that make up the vehicle surface. For most road cars it is around 0.25 - 0.5 but a sailplane can achieve less than 0.05.