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Originally Posted by Brazen
From a purely physics point of view, hitting an immovable object is the equivalent of hitting an object of the same mass and speed from the opposite direction.
That is why I am critical of ANCAP tests, a five star Ford Fiesta hits the wall at 60kmh - is the equivalent of hitting another Ford Fiesta travelling at 60kmh from the opposite direction. But my question is how many cars on the road weigh the same as the Fiesta? In reality the Fiesta would collide with a lot more heavier cars on the road which throws the test out in real world conditions.
That is why ALL THINGS BEING EQUAL a five star heavier car (like a Falcon) is probably safer in real world conditions than a light 5 star car.
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The calculation of the 5 star rating is made on passenger injury patterns and passenger cell deformation. If a small car has achieved a 5 star rating and a large car has achieved a 5 star rating, they both demonstrated similar injury patterns and passenger cell deformation when equivalent forces are applied. There is no difference between small car and large car 5 star ratings.