This question is not that easy to answer as it depends upon the impact speed,mass of the rider,type of bike and type of car....
Bottom line, though, it's kinetic energy. E=1/2mv2
300kg of bike doing 150MPH = 1750kg of Omega doing 60MPH. And the bike's energy delivered to a pretty small frontal area. Plenty of potential to hurt people in both cases.
Kevin
No disrespect intended to any on here or elswhere but....
No braking/deceleration/impact losses/projectiles etc etc etc.
Such stuff is actually quite complex to read at locus and on paper. And thereafter calculate. I have done such things for a number of years in an expert capacity (in the opinion of the Court).
For those not familiar with Court processes, it allows the 'expert' witness to sit in Court during the whole hearing, in the well of the Court, and advise the prosecution/defence accordingly.
note to self - must bring some organ doner piccies to the Lakes or Newent and dispell a few myths....
In hindsight, its one of the courses at University that I did not like the aftermath off....