Rob Edwards

The recent kerfuffle about M28.11/12 motors for sale got me to thinking about exactly how uncommon they may be. And I had two hours to kill while all three kids were getting the biannual dental maintenance. Which led to some tedious editing and COUNTIFfing in Excel.

I don't recall seeing this data presented in this manner before, perhaps I missed it. Anyway, it's a list of the production numbers of each engine and transmission type from 1982 to 1995 (AFAIK the data doesn't exist for '78-81) . There are a few glitches in the dataset where there was no engine code info for a given car (or where there was just a 'C' or an 'M'), and a couple of cars with 'automatic' engines mated to a 5-speed, which may be real or is just a typo.

You can see the 9 Clusbport cars (M28.41/G28.55), for instance.


Should be self-explanatory, some combos are US. only, some are ROW-only, some are both.

If anyone really cares, it would be relatively simple to break it out by country of origin for the ROW cars, but I doubt anyone cares.


Anyway, FWIW:

ROG100

You are a sick puppy - but thank you - trust your teeth are OK?

OTR18WHEELER

my '85 M28.44, A28.04 is an automatic, your list shows all as 5 sp.

Reddog2

Well - this is interesting. Doesn't look like too many M28.45s. Hopefully I won't need to find any replacements for mine.

Ferri

Hi there,

First I guess I should introduce me as it is my first message. Briefly, I'm a Porsche fan that had a Boxster S, a 997S, a 997 TT and now I 'just' have a 996 C4S and a 993 C2 Cabrio. Clearly I'm moving to classics / youngtimers and that's why I'm looking for a 928.

Well, now the question. In my searching, I wanted a 928GT, and I contacted with a guy that said to have one. In the vehicle specs appears like a S4, however the sticker shows combination engine / gearbox M28.41 / G28.55, that following this post doesn't fit neither S4 or GT. So, could be a CS unit? Somebody knows how can I identify it?

Thank you very much in advance and happy to be in the community!

Ferri

Rob Edwards

Hi Ferri, welcome!


There are only 9 928's with the combination of M28.41 and G28.55. 4 in Germany, 2 in France, 1 from Austria, 1 from Britain and 1 from Spain.

The Spanish car is an '89. What's the VIN of the car you're looking at?

Ferri

Hi Rob,

Thank you so much for your response. Unfortunately I don't have the VIN, because I just took a picture focused on codes, but I can ask for it. It is a chance to find out if is a CS with VIN? I've read in some posts that they are in same series that S4.

Thanks again and best

Ferri

hb4

Here's the results of a search on the CS engine/trans combo from the new OC web page and Registry coming soon. Thanks to Rob for his help in this.






Probably is or has been a topic for another thread, but when I do a filter for Option Code 637 "Special Version "Club Sport" 88" I get 7 of the 9 CS cars above and an additional 12 cars with G28.12 or G28.13 gearboxes.

Rob Edwards

Yes, somewhere in an older thread Erkka makes a comment about some CSs having G28.1X gearboxes. Not sure whether that's based on seeing the cars in person or on VIN searches.

Ferri

I've got the VIN, so it is not in the table and no option code CS 637 neither GT 639, but actually is M28.41 / G28.55.... Any idea what are I'm dealing?

Arnoud

WP0ZZZ92ZKS840364:
1989 C00 = Germany , M28.41 G28.12


I018 Sport steering wheel with elevated hub
I139 Seat Heating - Left
I298 Prepared for unleaded fuel, manual transmission
I326 Radio, Blaupunkt Berlin IQR 88 with ARI
I383 Sport seat - left
I387 Sport seat - right
M650 Sunroof

Ferri

Thank you Arnoud,

That's right, option codes are these, but gearbox code is G28.55, how to explain that? Also I see have a double exhaust pipe, like CS or GT, not in S4

I'm confused :-(

hb4

Here are the 17 cars with Option 637.....

Ferri

Thanks hb4,

Not in your table, what a strange creature I've seen then?

Vilhuer

I think Samuel has other proof than just PET data that almost half of the all CS made used longer S4 gearing boxes.