Engine sounds messed up on BRDM series

[DankE_SPB]

was driving around on local, noticed it on Kozelsk and decided to check all the vehicles

Chechen Spandrel - this one has its own engine sound, lets call it BRDM sound
Chechen BRDM-2 - this one is different from Spandrel, though they share same chassis, the engine sound was borrowed from british Saxon iirc

RF BTR-60 - saxon sound
RF BRDM-2 - saxon sound

MEC Gaskin - BRDM sound
MEC BTR-60 - saxon sound
MEC BRDM-2 - saxon sound

this might be intentional, to help distinguish Spandrels and Gaskins from others but its wrong imo
saxon engine sound is closer to real life one if you ask me, both for BTR-80 and BRDM-2