In first for car crash test you should trust Euro NCAP not US NCAP. Because your limits so low than Euro NCAP. Big cars seem people more safety. But that's not true.
See just these samples. Look for which cars got Five stars:
Everyone thinks about Volvo is the best safetly car on the world. But that's wrong. Renault's all models have five stars (My car is not a Renault). they have 8 or 9 car models. There isn't any more car could success that.