> well a strong enough crash will always result in harm to either or both sides. One still has to define the type of crash etc.
Sure, but that's way beyond the scope of a comment on a web forum to enumerate let alone describe in detail. Whatever the current survivability standards are, they'll say speeds and directions etc., so reuse those but with the new car as the other object in the collision.
I hate these minitanks but I acknowledge it's not simple to test like this.
Make heavier car forbidden on some roads or make them pay proportionally to a ratio of their empty weight vs. weight fully loaded would seem fair. This way trucks are not impacted, but stupidly heavy SUVs are. And apply a factor for EV, due to battery.