The differences between the Tartan 31 original and the Piper do not seem to be well documented. However, Beth and I just purchased a T-31 hull #107 (1991) and during our search we considered all years and styles. There were a number of differences between the various models and of course as should be expected some changes during the model run. While we do not consider ourselves to be T-31 experts we would like to offer the following as our observations. The original T-31 came standard with a baby stay, to help prevent or control mast pumping. The spreaders were straight back with all shrouds leading to the same position on deck. This baby stay was either fixed or adjustable depending on if the boat came rigged for a spinnaker (the spinnaker had the adjustable baby stay). With the Piper the baby stay was eliminated and the spreaders were swept back at what looks to be about a 20-degree angle (eyeball estimate). The original T-31 came stock with a pilot berth on the port side but also one could order cabinetry to match the starboard side cabinetry. In our visits to the boats available for sale it would appear that the pilot berth was changed to cabinets on the majority of boats. Down below the most significant changes between the original and the Piper were related to the head and the navigational station. The head on the Piper had two doors, one from the main cabin and one from the V-berth. This necessitated a change in the table from being folded up on the port side bulkhead to being a centerline table in the Piper. Also, while I can't say this was standard, we did notice in the Pipers we saw that the little seat in the V-berth was not in the Piper. The nav-station really changed. On the original the nav station had a seat that was an extension of the quarter berth and the nav table was a fold-down affair. On the Piper the nav seat was an extension of the port settee with back support that could be moved to allow for the seat to become a part of the settee itself. The nav tabletop lifted up for storage under it, for charts paper work and other navigational tools. The drawers located on the original nav station (three on the right of the table) were eliminated. Our memory is that the galley was about the same. Some of the soft curves of the interior are missing on the Piper with more straight lines. The engine on the original T-31 was an 18 hp Yanmar. This could be upgraded to a larger model. At some point this was changed, as our 1991 model has a Volvo Pinta (2002). The Piper seems to have a Westerbake of about the same size. Now one of the most interesting things we have noticed is the transom. On the Piper version the transom is concave with a step and a small flair (a second step). The swim ladder attaches under that flair. The stern pulpit has a lifeline between the port and starboard side. This intrigues me because this is the same transom on the 1991 T-31 we have. However, it is the only original t-31 we have seen with this configuration. On the original we typically found the swim ladder attaching to the middle of the transom and in the up position becoming part of the stern pulpits the transom itself was the classic design. Now while Beth and I are sure that other T-31 owners could add to this list and correct our errors this is what we remember FWIW. Ed Hancock" Wed, 23 Jul 2003 07:41:05 Ed, Thanks for the great summary of T31 evolution. Unlike you, I saw only one T31 in our boat buying search and bought it over comparable Sabers and Freedoms. So I really appreciate your experience of having seen so many variations on the T31. The only other variation I could add from having communicated with other T31 owners, would be battery location. Our 1988 hull #20 has 2 type 27s under the starboard settee, just forward of the ice box. Later models have them under the nav seat on the port side. I have no idea where batteries are in the piper version. Rick Davis Triall, T31 #20 Wed, 23 Jul 2003 08:12:37