You might be correct. But if that were the case it would likely mean the vehicle was being accelerated at the time of impact. Ever hit a speed berm fast without foot on the accelerator? It just punishes the suspension. You might even lose control or even swerve due to the tires briefly losing contact with the road surface, but the engine will not or should not rev at a higher RPM.
” it would likely mean the vehicle was being accelerated at the time of impact. “
I don’t think I agree, but am not 100% certain If an engine is under a load, it’s rpms are held back. Release that load, and the rpms instantly go up to a no-load condition. It would sound like acceleration, but really wouldn’t be
You can test this on any motor, gas or electric. Remove the load, and the motor’s rpms go right up.