Join Date: Aug 2007
Location: Staunton, VA - USA
I cannot make heads or tails out of the VIN you supplied. There is no Bentley model that I know of that should have a 'P' in the fifth position. Nor do I know what you're describing as an "RT." If the fifth position is a Z then you have a Bentley Continental SC. If the 'W' is correct in the 10th position of the VIN your car is a 1998.
Once OBD became the standard so did the connector for same. The round connector you describe sounds like the old RR-Bentley specific MasterCheck connection, but these were long gone by 1998.