[P.S.]

That crash test wasn't fair. The Impala had its motor and transmission (and who knows what all else) removed from it before the "test". That lightened the car considerably.

If the Impala was an intact car and they did that same test, the new car would have been pulverized by the full-weight old car and the motoring public would want the old ones, not the new ones from now on, and new car sales would suffer, etc.