A motor vehicle collision has so many variables that it is hard to answer that question. Size, vehicle speed, road conditions, road design,, design of the car etc etc can affect it. I've seen a few mvcs where a driver survived because the point of impact was an inch to the right of the b pillar, had it been the other way he would have been dead.
You can't prevent collisions because 2 cars or more are involved. Your best bet would be to buy a car you feel comfortable driving and what you feel safe driving. Vehicles nowadays are safe as long as you operate it safe and according to road conditions.
Not sure if that answers any questions and im sure other members can add to the discussion.