928cs

As you may guess, I'm a bit nut about the 928 S4 Club-Sport, beeing one of the few lucky guys that found and bought one quite a long time ago (I bought my first in 1999). Since then, and in fact even before buying this car, I tried to learn as much as possible about this very limited, in number, version.
If you are intererested by the 928 CS, please read this thread .

Now, I think that it may be good that the "daughter" of the CS finally has her own thread. By that, I mean that the 1989 928 GT deserves this.
In essence, the version of the 928 is a manual S4 with the CS mechanical modifications. So, it weights nearly the same as a manual S4, but with a different character.

According to my findings, it was decided to produce the 1989 GT as a special model in June 1988. The CS certainly demonstrated that a sportier 928 could sell well, but not as spartan as the CS.
By special, it was meant to be a limited in time model, in addition to the manual and automatic S4s that were available until the end of the 1989 MY.

The introduction to the German sale network and the press was in January 1989 and it seems the first real GTs were produced around the same period. The customer cars were certainly delivered around March 1989, in Europe.
The CS's production was finished just before the start of the GT.
Production finished with the 1989 Model-Year, so end of July 1989.
All in all, it seems that 473 cars were produced:
- 116 for the USA and the Canada. VIN between WP0JB0922KS861089 and WP0JB092XKS861244
- 358 for the Rest of the World. VIN between WP0ZZZ92ZKS841332 and WP0ZZZ92ZKS842484
This figures may change a bit as I do have doubts about somes cars.
Also, there were prototypes and preproduction were made before the "regular" ones. These cars were really regular S4s with special orders specifications to have CS engines, gearboxes, rims, exhaust, etc.


This is not a 928 GT

The 1989 928 GTs don't have specific VIN range so they are mixed within the usual range. But, they are quite easy to identify with their specific engine and gearbox type, specific equipment codes.
The M28/47 85K engine is essentially the production version of the M28/41 SP of the CS and the G28/55 2K gearbox was exactly the same, even the serial numbers follows the CS ones.

The mandatory equipment codes are:
M220: limited slip differential
M393: CS Rims
M639: 1989 928 GT

The usual ones were:
I167: Bridgestone RE-71 tyres
M474: Sport shock absorbers.
Both were ordered with order P85, and that was free.

Also, the GT was without protection side mouldings but it was possible to have them for free by using the Z-order #126. This can be spotted by the 01261 into the additionnal equipment list.

You can see all of this information on the build sticker of the car, either the trunk one or the warranty booklet one.
Example:


This is a german (C00) 1989 GT, without P85 order but with 126 Z-order.

Here are the physical modifications, compared to a S4:
- Engine type M28/47, with modified camshafts. It seems that the intakes were also reworked.
- LH ECU is 928 618 123 14 (same as 1989 CS)
- EZK ECU is 928 618 124 22 (vs 928 618 124 16 for the CS)
- Camsahfts are different (identical to CS but with different references)
- G28/55 2K gearbox with 3% shorter final drive ratio than the normal G28/12. Same as CS.
- CS rims, 8X16 ET 60 front and 9X16 ET 60 rear with 17mm spacer from the 951 (944 Turbo)
- Smaller intermediate mufflers than early S4, but same as regular 1989 S4 (except for Switzerland, which kept the big mufflers)
- Twin outlet final muffler
- Fenders with rolled lip on the upper part, to avoid contact with the tire.
- 6600 redline instead of 6400 (same as CS, despite the fact that the cutoff will be at 6800 instead of 6750 for the CS).
- 20mm shorter gears lever
- 928 GT monogram in body color at the back, or not. This was free.

All kind of colors, equipment and special orders were available, as a regular S4.

From August 1989 (start of the 1990 MY), there were only two models of the 928 available, the S4 with automatic gearbox and the GT with a manual gearbox.
The 1990 and 1991 GTs differ slightly from the 1989, with their PSD, improved sound deadning and electrical systems, etc, so that is another story.
Strangely, I have found 12 1991 GTs with the M639 equipment code so will investigate.

I hope that this helps, please, add and/or correct this, to improve our knowledge.


Samuel

Emilliden11

My father sold his slate grey 1989 928 GT a couple of years ago, apparently this car was very fun and sharp to drive and a totally different feeling than the s4 or the GTS
if you are interested the VIN number for the car is WP0ZZZ92KS842030

/Emil

928cs

wp0zzz92zks842030 is a Swede example, with heating sport seats and a sunroof. If I'm correct, it doesn't have a catalytic converter.
Cool configuration.

Emilliden11

Sounds right to me.
Great color i like the slate grey alot

Wisconsin Joe

Semi-random question:

With the 8x16 in the front, and the 9x16 in the back, what tire sizes came on it?

Rob Edwards

They were still 225 in front, 245 in back.

Tom. M

Can you breakdown the C36 (Canada) vs. US delivery numbers too? I've heard there were only 16 for Canada (seems low).
Also, engine produced 326hp vs 316 for S4. Engines were spec'd to be 10:1 CR vs the 10:1 (-0.6) CR of the S4. When my engine was apart it had noticeably smaller dish on the pistons. We've also cc'd a S4 block that measured out at 9.2:1 CR

Rob Edwards

100 US market cars, 15 Canadian market cars.

Tom. M

Thanks Rob. Wow that is low. And I believe 4 came with sport seats.

Rob Edwards

All 15 Canadian cars are optioned identically (heated seats, sunroof, and CD-2, sport shocks, LSD, and the '89GT I639 designation), except that 8 had sports seats and 7 did not.

928cs

You are correct, a new kind of pistons was introduced with the GT.

See the next post for the details.

928cs

Ranfurly

Were any 89 GT’s made RHD? I imagine there would have been, if so how many, any delivery info for RHD markets?

928cs

This should answer some questions
927: RHD
928: LHD

C531XHO

Haha, 927 I like it 😊



David
'85 S2
'89GT (927)