For example instead of storing, x1, x2, x3, x4, x5, you can store x1, x2-x1, x3-x2, x4-x3, x5-x4 Using few decimals it may compress better with the standard algorithms.
Assuming almost constant speed, you may guess x3 from x2 and x1 and x3=~ 2*x2-x1, so instead of x3, x4, ... you store x3-2\x2+x1, x4-2\x3+x2, and compress it.
For a car, I'd assume constant acceleration and if I didn't make a mistake, x4=~ 3x3-3x2+x1, so you store x4-3x3+x2-x1 and compress the sequence.
