[Kamog]

I agree with Renegade. In a head-on crash, you'll be safer in the heavier vehicle. Because of the greater kinetic energy and momentum, the heavier vehicle will be slowed down less, and therefore you'll experience less deceleration.

I'm not sure which car would be safer if the vehicles individually crashed into a solid wall, but we're discussing a collision with another vehicle, which is what he said in his original post.