Engine Codes for '89 GT
#1
Rennlist Member
Thread Starter
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Did the 89 GT engine have a specific engine code within a range or did Porsche pull the engines with better numbers aside to be put in 89 GT cars?
My recollection is the latter.
Thanks
My recollection is the latter.
Thanks
#2
Archive Gatekeeper
Rennlist Member
Rennlist Member
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
The serial numbers are different for GT motors vs. S4 motors-
89S4 5-speed motor is M28.41, 81K 00001 >05000,
89GT 5-speed motor is M28.47, 85K 00061>50000.
89S4 5-speed motor is M28.41, 81K 00001 >05000,
89GT 5-speed motor is M28.47, 85K 00061>50000.
#3
Rennlist Member
Thread Starter
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Thanks for the clarification.
#4
Former Sponsor
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Additionally, the heads are marked "GT", although PET makes no distinction.
#5
Race Car
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Manual 1989 S4 (including CS): M28/41 81K 00061 and up (New cylinder heads from M28/41 81K 00121).
1989 GT: M28/47 85K 00061 and up.
My former 1989 CS had the M28/41 81K 00106 SP. It was replaced under warranty by the M28/47 85K AT 00106.
1989 GT: M28/47 85K 00061 and up.
My former 1989 CS had the M28/41 81K 00106 SP. It was replaced under warranty by the M28/47 85K AT 00106.
#6
Rennlist Member
Thread Starter
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Interesting. There's a ROW (Japan) engine on eBay with the GT stamping on an a non-manual car.
89 PORSCHE 928 S4/GT M28/42 5.0L 32V EURO SPEC COMPLETE ENGINE HAS 43,394 MILES
89 PORSCHE 928 S4/GT M28/42 5.0L 32V EURO SPEC COMPLETE ENGINE HAS 43,394 MILES