Watching videos of European demolition derbys it appears Volvo is the car of choice there.
Their variety of demolition derby reminds me of the old figure eight races we used to have that I believe were banned due to being too dangerous. It’s a literal no holds barred race and they ram each other, very entertaining. And yes, the old “brick” Volvos are the car of choice, followed by certain American yank tanks, but the American cars seem to have a target on their backs despite being one of the more solid vehicles out there. It can be a little sickening, I’ve seen classic Jags, even Rolls-Royce Silver Shadows in those things. I guess they’re in sad shape before then, but it’s still shocking to an extent.