The Historic Yachting Varsity Results page of the O&CSS website maintains the history of the Yachting Varsity Match. That makes the one set of results available to members of both Universities.
(Yachting at Cambridge – ‘big boat’ stuff in craft over 24 feet in length – has been the province of the CU Yacht Club since 2013. Sailing in boats of 30 feet and under is what we do – and we get together in the overlap!)
There is currently no online historic list of yachting teams that we are aware of.