Red Alert 1
on regular terrain where
tracked vehicles go 80% their full speed
and wheeled ones go 60%

13 tracked = 17 wheeled
12 tracked = 16 wheeled
11 tracked = 15 wheeled
10 tracked = 13 wheeled
9 tracked = 12 wheeled
9 tracked faster than 11 wheeled
8 tracked slower than 11 wheeled
8 tracked faster than 10 wheeled
7 tracked slower than 10 wheeled

17 wheeled faster than 11 air
17 wheeled barely slower than 12 air
18 wheeled faster than 12 air
18 wheeled slower than 13 air
19 wheeled faster than 12 air
19 wheeled barely slower than 13 air
20 wheeled = 13 air
21 wheeled faster than 14 air
21 wheeled barely slower than 15 air

Recommended possible speeds for TD units in RA
Buggy/Hummvee/Ranger, Bike, Chinook, Apache/Longbow, Orca
13, 17, 12, 16, maybe make Orca 17 just to be more advanced
14, 18, 13, 17, 18
14, 19, 13, 17, 18
15, 20, 13, 17, 18
16, 21, 14, 18, 19
16, 21, 15, 19, 20
16, 21, 15, 20, 21
Too much a speed jump from 20 to 21 so maybe this:
16, 20, 14, 18, 19

C&C (Tiberium Dawn)
on regular terrain
Recon Bike = Chinook Transport
40 wheeled = 30 air
30 wheeled faster than 35 tracked
Hummvee/Buggy (30) is 75% of Recon Bike (40)?
Chinook (30) is 75% of Apache&Orca (40)?