Vehicle explosion resistance

I was experimenting with vehicle armour on my server and found out that newer vehicles lack explosion resistance. This is mostly noticable on “The Contract” vehicles like Ocelot Vitrue or Omnis e-GT. They blow up on first blast even though i upgraded armour and armour plating. Toreador and Starling seem weaker but not completely weak, i wonder why.

So, is there a way to make vehicles explosion resistance match gta online?