Chassis No. WP0ZZZ92ZKS842374
This extraordinary German-market 1989 Porsche 928 GT represents what Porsche Museum has described as “an extremely rare wide-body version from the factory” and “a unique, very special 928, one that you won’t find again quickly if at all.”
The GT package elevated the standard 928 S4 with significant performance improvements, including increased power to 326 horsepower and 317 lb-ft of torque thanks to upgraded intake and camshafts, a short-ratio five-speed manual transmission with a short shift lever, sport shock absorbers, 40-percent limited-slip differential, and distinctive 16-inch Club Sport forged wheels.
What truly distinguishes this Slate Grey example is its extraordinary factory customization courtesy of the Stuttgart marque’s vaunted Sonderwunsch—or “Special Wishes”—department. Research conducted by the current owner confirms that the code XC1 wide rear wheel fender modification was only equipped on approximately 10 examples of the 928 model. The combination of code XB2 wide side rockers with XC1 was even rarer, as typically XC1-equipped vehicles were only fitted with standard smaller and narrower skirt trim (code XB4). The code XA2 Porsche 935-inspired Slant Nose front-end design option was extremely rare on its own, making this combined specification truly exceptional.
Factory codes 09981 and 09991 confirm this car received the attention of Porsche’s dedicated Sonderwunsch team. Code 09981 indicates that the entire car was transported to the Exclusive Department facility, while 09991 indicates Exclusive options that could be installed on the standard production line. The special aerodynamic mirrors were not listed in any Porsche catalog or price list but, according to the consignor, were sourced and installed at the suggestion of the head of the Exclusive Department for 487.80 DM, as documented on the car’s original invoice.
These rare factory customizations are complemented by numerous additional factory options including heated driver’s and passenger’s seats, lumbar support for both seats, and full draped Slate Grey leather seating surfaces. Other interior features included Blaupunkt Berlin radio, tinted upper Sekuriflex windshield, and an electric sliding sunroof.
Belonging to its original and sole owner since delivery, the car’s history is meticulously documented through invoices and its stamped Warranty & Maintenance booklet. This includes an odometer replacement performed by Porsche Center Saarland in 2003 during which the new unit was inadvertently set to 45,183 kilometers instead of the last recorded original mileage of 55,183 kilometers (during a 2002 service at Porsche Center Saarland), creating a 10,000 km difference. The seller maintains complete service records, invoices, and maintenance book entries spanning over three decades, offering full transparency regarding this well-documented discrepancy. Based on these detailed records, the actual total mileage is estimated at approximately 68,000 kilometers.
Between 2020 and 2023, the car received comprehensive mechanical refurbishment and select enhancements. The work included engine renewal with three new camshafts, new timing chains, and valve components. The fuel system received a new tank, pump, and filter, while the suspension was updated with all 16 damping plates replaced and wider 57-mm H&R rear wheel spacers installed (original 43-mm spacers are included). Essential systems were rebuilt including the brake system, climate control (new compressor, lines, dryer), and electrical components (LH engine control unit, air mass meter, ignition system). Modern upgrades included a Blaupunkt Bremen SQR 46 DAB radio with Bluetooth, Eton Res 200W subwoofer, and a Strosek muffler.
Significantly, all original parts have been retained, allowing for complete restoration to factory specification under new ownership if desired. These include the original set of 928 GT forged Club Sport wheels with an adonized finish (in addition to the polished set currently mounted), the original 928 GT dual-exit muffler, original Blaupunkt Berlin radio with amplifiers, mounting brackets, cables, and manuals, original spare tire and tool kit, and original 43-mm rear wheel spacers. The car continues to receive meticulous maintenance, as evidenced by a May 2025 service at Porsche Zentrum Saarland that included cooling system flush, brake fluid replacement, alignment adjustments, headlight adjustments, and replacement of the oil pan due to defective oil drain plug threads.
As a sign of its originality and extremely rare build specification, it is noted the car is still on its original registration with the original first-issue DIN plates and has never been deregistered. Furthermore, the car was subject to a lengthy article in the May 2023 issue of Porsche Fahrer Magazin showcasing the car, unseen to many, to a worldwide audience. The 928 GT remains one of Porsche’s most significant grand touring models, blending supercar performance with practical everyday usability. Finding an example in this exceptional condition inside and out, with this level of Special Wishes equipment and documented history at official Porsche Centres or certified workshops, presents Porsche collectors with an extraordinary opportunity to acquire what may be a true one-of-one factory special.
Images courtesy of Roman Rätzke.