Here is the engine serial number for a 1989 engine.
Serial number decoder, both for engines and chassis.
The third digit of the engine serial number is as follows:
0-9 197X
I, O and Q are ommitted.
911/93 1974 911S USA, 175HP @ 5800; Early Heat Exchangers
930/03 78-79 Euro SC [email protected]:1 39mm Ports
930/04 78-79 USA SC 180HP@5500 8.5:1 39mm Ports
930/07 80 USA SC 180HP@5500 9.3:1 34mm Ports
930/09 80 ROW SC 188HP@5500 8.6:1 39mm Ports
930/10 81-83 ROW SC 204HP@5500 9.8:1 39mm Ports
930/16 81-83 ROW SC 180HP@5500 9.3:1 34mm Ports
930/20 84-86 ROW Carrrera 231HP@5900 10.3:1 CR
930/21 84-86 USA Carrrera 207HP@5900 9.5:1 CR
930/23 87-89 USECarrrera 217HP@5900 9.5:1 CR**Rerated
930/21
M64/01 89-94 Carrera2/4 USA/ROW Manual 247 HP@6100
M64/02 89-94 Carrera2/4 USA/ROW Tip 247 HP@6100
M64/03 91-93 CarreraRS ROW 260 HP@6100
M64/05 94-95 993 Non Varioram manual ROW 272 HP@6100
M64/06 95 993 Non Varioram manual USA 272 HP@6100
M64/07 94-95 993 Non Varioram Tiptronic ROW 272 HP@6100
M64/08 95 993 Non Varioram Tiptronic USA 272 HP@6100
M64/20 96-98 CarreraRS Varioram 3.8 ROW 300HP@6500 ODB-I
M64/21 96-98 993 Varioram manual ROW 285 HP@6100
ODB-I
M64/22 96-98 993 Varioram Tiptronic ROW 285 HP@6100
ODB-I
M64/23 96-98 993 Varioram manual USA 285 HP@6100
ODB-II
M64/25 96-98 993 Varioram Tiptronic USA 285 HP@6100
ODB-II