Originally Posted by
Goldenrivett
V1 min is different due to different acceleration on 1 or 3 engines to VR. V1 min will be lower for 3 remaining engine aircraft acceleration.
Attaching some flash to the bone: V1(min) can be lower for the 4 minus 1 case thanks to the acceleration capacity of the remaining thrust. A twin past V(eng.fail) has 50% thurst remaining but quad retains 50% more than that.
@J.T. Escalated quickly, thanks!