V1 (decision speed) is related to runway available and aircraft performance. It is the speed below which the aircraft can be stopped on the remaining runway if the take off is rejected.
Vr is related to aircraft performance and gross weight (the speed at which the a/c is rotated into the takeoff attitude)
Technically V1 could be higher than Vr however as previously stated once in the flying config rejecting the takeoff in most cases would be far more hazadous than continuing.
I hope this helps.
Trash is better than pax................
[This message has been edited by Trash Hauler (edited 11 September 2000).]