If I can’t put cinder blocks and scrap metal in the trunk, where do you suggest I put them? In the passenger compartment? Tied to the roof?
I believe we are talking about a Volvo 960 wagon that offers no protection from “cinder blocks and scrap metal” in any collision/rollover. What ever survival chance you think you might have in that “revered” Volvo roll cage just went out the window while ducking cinder blocks and scrap metal (what a thought) bouncing around the compartment. If you think a 16 year old girl knows how to adequately secure same, I’d be impressed. I suggest like ALL advice on adding weight from any competent recognized consumer agency that you don’t even consider using it. Bags of sand that will break apart on contact with a surface is often a first suggestion, and even that should be confined.
What next ? Rocks, chain and barbed wire ? I suppose anything with weight is acceptable. Not.
BTW, doubled wrapped “tube sand” is pretty darn cheap at just a few dollars a 70 lb bag to consider many inappropriate substitutes. Though bags of uncured concrete makes sense too…a little messy if it leaks or gets wet.
You’re arguing against physics and those who have experience in “cleaning up” after accidents and have responsibility to collect data on them. It’s which is the safest. You poor choice survivors can recommend all the scrap metal and concrete block treatments you want. The non survivors aren’t around to change their minds.