Over the years, Porsche has always seem to come up with a limited edition model to add to their current production offerings. These become some of the rarest cars as well as the hardest to find information on. Below I have compiled a list of every limited edition Porsche I know of, as well as all prototype vehicles. Some of the information is complete, however in some cases, no one really knows all the details! They are in order by "production" date.
1938 Typ 64
356/1 Mid-Engined Prototype
1948-49 Gmünd Coupes
1952 356 America Roadster
Typ 695 T-7 (911 Prototype)
914/8
916
Porsche Long-life Car Prototype
1975 Silver Anniversary 911 S
1976 912 E
1979 "Last 930" Editions
924 Sebring '79 and 924 Martini Editions
924 Carrera GT
911 SC Weissach
924 Weissach
928 Weissach
1984 911 SC/RS
911 Slant Noses
928 Clubsport
939
Four-seat Streched 928
911 Clubsport
250,000th 911 Commemorative Edition
911 Panamerica
Typ 989
25th Anniversary 911 Edition (1989)
1989 911 Speedster
911 RS America
1992 911 America Roadster
1992 911 Turbo S2
1992 911 Turbo S
968 Turbo S
968 Turbo RS
968 Clubsport
1994 911 Turbo 3.6 S (and Flat-nose)
1994 911 Carrera 4 Widebody
1994 911 Speedster
1997 911 Turbo S
Porsche Boat
Porsche Tractor
Porsche Zeppelin
Porsche Aircraft