Oops, not sure this was a productive use of my time !
I've learnt some interesting things from my analysis, such as:
1 - Acceleration+Land Speed+Turbo is 8.5 for all classes except Metalweight which is 8. Never ever use that class.
2 - Only use these vehicles:
Biddybuggy
Landship
Mr.Scooty
Sport Bike
Yoshi Bike
Jet Bike
Comet
3 - Only use these tyres:
Roller
Azure Roller
Button
Wood
Sponge
Cushion
4 - Only use these gliders:
Cloud Glider
Flower Glider
Bowser Kite
Parafoil
MKTV Parafoil
Peach Parasol
Parachute
You can obviously use others, but it is inefficient to do so.
Edit: Hmm, actually since acceleration always takes the floor of the value (unless it's above 4.00) and factoring in the diminishing returns on acceleration these are the best speed, acceleration and turbo stats I could come up with:
Setup 3 is looking mighty tasty there, and setup 4 was the one I worked out to be the best for acceleration, speed and turbo before even crunching the numbers. I'm so awesome!