Vilhuer

Thilo, what number you ended up in German Forum? Different than 1620'ish?

https://rennlist.com/forums/928-forum/177602-how-much-928-gt-was-made.html

Thilo

Erkka-

Thanks for the link, I'd seen but since forgotten about that thread.

No hard (or for that matter, soft) numbers have been put forward on the German forum. But I'll let them know about the above.

Best,

Thilo

docmirror

I'm gonna disagree with you a bit on this one. The specs in my handbook list the engine HP for the S4 as "316", and for the GT as "326", torque values are also diff. The GT also has PSD on all models I've ever heard of, and the S4 is an option. Gear shift lever on the '90 and later GT is a short throw, and the tach has a different redline tick mark than an S4. Engine idle is raised 100RPM(cams), and the injector profile is very different than S4. Correct that the 639 option on all GT's from 90-92, 89 is a weird beast, some have some don't. The ride of the GT is significantly stiffer than an S4. Also, the codes on the engine are clearly different. The 90 handbook delineates the GT in several regards, starting right on the front cover, which I won't bore you with.

The market also delineates the GT from the S4 by a few thou, unless the seller is an ignorate doof, which is how I bought mine so cheap. I've driven GTS auto trans', and my GT and I prefer the GTS for tootling around, but prefer the GT for serious business.

worf928

And I with you, a bit.

Not the '89 GT in the US. Debate is still on-going for the ROW '89 GT on PSD as a non-standard option. 40% LSD is the diff for the US '89 GT (and S4.)

All M637 and M639 (CS and GT) have a different shift lever than S4 5-speeds. Therefore '88 CS and '89-'91 GT.

The 'fat' shifter boot began in '91. But is a very nice (but pricey) retro-fit to older 5-speeds.

Otherwise I agree that the GT is a separate model. Certainly as of '90.

Thilo

Doc-

No real disagreement, I think (at least on my part). I did *not* mean to imply that there are not numerous differences between the S4 and the GT. Engine, transmission, suspension, wheels, etc. But that's just what the M639 option package means. What I am saying is "factory-internal" there was no distinction that would have warrented e.g. a different VIN code.

Example: The German KBA (Kraftfahrtbundesamt) codes the GT the same as the S4. When some aftermarket manufacturer gets type approval for some part so it's legal to put it on your GT, the type approval papers state it's for the S4, no mention of the GT. To the beauraucracy they're all the same.

At least that is my information/understanding.

Thilo

docmirror

Ah, I see what you mean now and I understand. The GT was not a type identifier by the VIN code, but only by it's option list. It is however, a very different car by option than a 1987-1989 "5 speed S4". From the owner's perspective, and the market, they are very different beasts.

Dave, we both missed one of the more obvious diffs: Wider wheels in Design 90 style. Oops, my bad....

worf928

Ja! Very correct! And another trivia tidbit: the front wheels on the '89 GT are '8 inch while on the '90 and '91 they are 7.5 inch.