The BTR is actually good. running 9.8s from full throttle launch, that will put down muscle cars and supras, all that jazz
RGT is just slow
here is some suspension for the BTR to get you started
-40 / +20
15.5 / 5.0
1 / 10
10 / 1
4 / 4
5.5 / 0.0
-1.00 / +0.55