Trouble with NCAP is they test crashing into a solid barrier, which is similar to a head on crash with an identical car to your own. But if you are driving a large heavy car and crash into a small one, it is more (for you) like crashing into a soft and comfy cushion as the smaller car will just fold up under the onslaught.
But for the smaller car, it's a bit like being the cushion. The smaller car, and occupants, largely becomes the larger car's 'crumple zone', I'm not sure NCAP tests reflect that.
That said, my last car looked the spitting image of the NCAP crash test car, following a head on collision in which it died (other driver's fault!). Cabin deformation and suspension intrusion was exactly as predicted. Airbags deployed as intended and even my (none serious) injuries were consistent, 'risk of soft tissue at lower legs' iirc, and indeed I had impressive big lumps and bumps on my shins, where my legs were thrown against the facia, but no broken bones. I hasten to add other driver not seriously hurt either.
