For Sale at Auction: 1989 Porsche 911 in Amelia Island, Florida

Chassis No. WP0EB0936KS070302
Engine No. 68K00558

Perhaps one of the least understood models to emerge from Porsche's Sonderwunsch (Special Wishes) program, the 911 Turbo Slantnose, has only recently gained proper recognition among collectors for its motorsport-derived design, rarity, and hand-built construction. While the standard 911 Turbo could match or outperform contemporary Italian exotics such as the Lamborghini Countach and Ferrari 512 BB while retaining the familiar 911 silhouette, certain discerning clients sought a road-going Turbo that more closely echoed Porsche's dominant 935 race cars. The style of early Slantnose conversions varied widely until 1987 when Porsche's Exclusive Department formalized the concept under option code M505, bringing clarity to both its specification and considerable cost.

By 1989, the final year of G-Body Turbo production, the M505 Slantnose had become the most expensive and exclusive option Porsche offered, carrying a staggering $29,555 premium-roughly the price of a new Porsche 944. Beyond its dramatic flat-front fenders and pop-up headlights, the Slantnose incorporated functional aerodynamic enhancements, including vented front fenders, widened rocker panels, and rear brake and oil cooling ducts. Just 143 M505-equipped 911 Turbos were produced for the United States in 1989, with only 50 rare Cabriolets slated for the 49-state C02-market. Notably, these final-year Turbos are the only Slantnose examples fitted with the Getrag G50 five-speed manual transmission, further elevating both their driving appeal and long-term collectability.

Completed within Porsche's Sonderwunsch department in November 1988, this 1989 911 Turbo Cabriolet features the all-important M505 option code denoting a true factory-built Slantnose. In addition to the near-$30,000 option, this "triple black" example with its non-metallic Black paint, Black partial leather interior and Black soft top was ordered with a raised hub steering wheel with inset color Porsche color crest, short shifter, tonneau cover, limited slip differential, and sport seats with electric height adjustment. A copy of its original window sticker reveals it was delivered via Crestmont Porsche (now Porsche North Olmsted) and its CARFAX Vehicle History Report confirms it remained with its original owner in Ohio until 2010 upon the owner's passing. Early ownership history notes a 1993 incident, though present paint meter readings indicate original paint remains on all recorded panels with the exception of the front bumper blade and hood. Noted Porsche specialty dealer Sloan Motor Cars in Connecticut then acquired the car after which it returned to Ohio with Marshall Goldman. The car then returned to Connecticut with noted collector David Saunders of Darien until 2017 when the current owner acquired the car. Its minimal mileage increase-from 9,099 miles in 2008 to just 9,304 miles at its 2017 sale-shows that this exceptional Turbo was used sparingly as it transitioned from a lightly enjoyed automobile into a highly collectible symbol of 1980s excess and performance.

Today, this matching-numbers triple-black Type 930 Slantnose is offered from its owner of the past nine years with just 9,449 miles at the time of consignment. Under current ownership, this highly collectible Turbo has received regular servicing at New Vernon Coach & Motor Works with an engine-out service in 2023. Most recently, in December 2025, with 9,431 miles service work included a brake fluid flush, engine oil change (Motul Synthetic) with new filters, and front and rear hood struts. Additionally, the rare factory Slantnose has been inspected by Rennwerk Porsche in Elmsford, New York whose report is on file noting no evidence of previous damage. Further confirmation of this is also found in the factory Cosmoline finish applied to all corners of the car. Accompanied by its Porsche-issued Certificate of Authenticity, toolkit, books, and service documentation, this hand-built, motorsport-inspired 911 Turbo-produced through Porsche's famed Sonderwunsch program-stands as one of the most dramatic, exclusive, and collectible expressions of the air-cooled 911 Turbo era.