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Lot 843

1992 Porsche 911 Turbo America Roadster

  • Chassis no. WP0CB2967NS460777

Sold for $140,250


964 SERIES. Turbocharged and intercooled SOHC flat six-cylinder engine, fuel injection, five-speed manual gearbox, four-wheel independent suspension, and hydraulic four-wheel disc brakes. Wheelbase: 89.4"



Porsche’s initial work with turbocharging their racing cars during the late-1960s and early-1970s, led to the development of a turbocharged street version of the 911. While initially required to comply with the FIA’s homologation regulations for GT-class racing, development continued unabated when the rules changed. The new car was repositioned as a fully-equipped road model to lead the 911 series and compete directly with the costlier and more exotic “supercars” from Ferrari and Lamborghini.



Ernst Fuhrmann led development, adapting the technology developed for the all-conquering 917/30 Can-Am car to the 3.0-liter flat-six from the Carrera RS 3.0. As racing fans will immediately recognize, the 917/30 remains infamous today as “the car that killed Can-Am,” because of its dominating, opposition-crushing performance. Suspension refinements, larger brakes, and a strengthened four-speed manual gearbox rounded out the package. A functional “whale-tail” rear spoiler increased cooling airflow to the rear-mounted engine and provided additional rear downforce. Wider rear wheels with upgraded tires resided within flared wheel wells, increasing grip and stability at speed.



Simply known as the “Turbo,” the new vehicle was released in the spring of 1975, with export to the U.S. commencing in 1976. In 1978, power output reached 300 hp (DIN), with a displacement increase to 3.3-liters and the addition of an air-to-air intercooler. Porsche’s continuous development included slight revisions to the rear spoiler to accommodate the intercooler. Braking was significantly upgraded as well. Porsche’s careful and relentless development program also ensured that the 930 was a sound base for racing vehicles and led to the highly successful 934 and 935 racing cars. The 930 proved fast but demanding; however, skilled drivers quickly learned how to drive the 930 properly and to drive the car beyond the limits of most other sports cars.



The 964 generation of 911s, introduced in the late 1980s, was no exception. Retaining Porsche’s highly developed air-cooled flat “six,” the Turbo delivered nearly unbelievable performance statistics. Although the rear-engine setup and traditional design formula remained unchanged, Stuttgart had produced a supercar with 320 brake horsepower and acceleration from rest to 60 mph in just 4.9 seconds, in showroom-stock tune.



Appearance-wise, the 964-series 911 models retained their distinctive and purposeful styling. Priced from about $64,000 for the Carrera 2 and almost $100,000 for the Turbo, by 1992, Porsche’s 911 was a stunning automobile in every respect. Despite the early-1990s economic recession, however, some owners demanded even more from their Porsche experience. To meet the burgeoning demand for high-end cars with truly monstrous performance and styling cues taken directly from the track, as well as bespoke interior treatments, several noted firms stepped forth, including Gemballa, Hamann, RUF, Sportec, TechArt, and others.



In 1992, Mr. Dingman engaged San Diego, California’s AJ-USA, Inc., and Lou Milone to fulfill his vision of the ultimate Porsche 911 Turbo, beginning with an original 1992 America Roadster, one of only about 207 examples built. To that end, an investment of some $83,000 was made for almost countless upgrades supporting the more obvious ones, including the addition of a turbocharged and intercooled engine, custom body modifications, a four-point roll-bar, a custom fabric top with distinctive blind rear-quarters, interior upgrades, and much more. Over $10,000 alone was spent for the fabrication, installation, and finishing work required to fit front and rear brake-cooling ducts and the associated plumbing!



The aggressive “triple black” color scheme leaves no doubt about the true intentions of this turbocharged sports car, and a recent inspection confirms that it is remains excellent in appearance throughout, complemented by a set of alloy wheels mounted on Dunlop tires. The car’s superior condition is attributed not only to its excellent maintenance but also to the fact that it only has 3,378 original miles. Other welcome additions are a boost-pressure gauge to monitor the turbocharger’s operation, as well as a Kenwood AM/FM/CD stereo unit, should one tire of the glorious sound of the turbocharged flat-six. Copies of the invoices from AJ-USA, Inc., confirming the modifications and work performed, accompany the car at auction. With its iconic styling, many upgrades, and tremendous performance capabilities, this Porsche will continue to provide a truly visceral driving experience to match, with the added bonus of its open bodywork.

Please contact our exclusive automotive transportation partner, Reliable Carriers, for a shipping quote or any other information on the transport of this vehicle.

Alexander Weaver

aweaver@rmsothebys.com

+1 864 313 6844
California, United States

Alexander Weaver joined RM Sotheby’s in 2011 as a Car Specialist after graduating from Furman University in South Carolina. Born... read more

Augustin Sabatié-Garat

asabatie-garat@rmsothebys.com

+44 (0) 74 1511 4179
United Kingdom

Augustin Sabatié-Garat joined RM Europe in 2012 as a Car Specialist after more than a decade in the collector car hobby. Gradua... read more

Barney Ruprecht

bruprecht@rmsothebys.com

+1 203 912 7168
Ontario, Canada

Barney’s interest in classic cars began at an early age after being introduced to his father’s all-original 1965 Porsche 911. Barney l... read more

David Swig

dswig@rmsothebys.com

+1 415 302 2247
California, United States

David Swig joined RM Sotheby’s West Coast division as a Car Specialist in May 2015. David is a life-long automobile enthusi... read more

Don Rose

drose@rmsothebys.com

+1 617 513 0388
United States

Don joined RM in 2006 after several years of professionally trading sports and classic cars, and after earning a reputation as a noted... read more

Donnie Gould

dgould@rmsothebys.com

+1 954 566 2209
Florida, United States

Donnie Gould joined the RM team in 2002 as a partner and Car Specialist after more than two decades in the vintage automobile auction ... read more

Gord Duff

gduff@rmsothebys.com

+1 519 352 4575
Ontario, Canada

Gord Duff began his journey with RM Sotheby’s in 1998. Since then, he has gained an intimate knowledge of a variety of marques a... read more

Jake Auerbach

jauerbach@rmsothebys.com

+1 310 559 4575
California, United States

Jake Auerbach got his start in the automotive industry at an early age, spending his summers during high school working at a classic c... read more

Kurt Forry

kforry@rmsothebys.com

+1 717 623 1638
California, United States

Having worked for Bonhams’ Automobilia department for over 10 years, Kurt Forry joined RM Sotheby’s with more than a decad... read more

Matt Malamut

mmalamut@rmsothebys.com

+1 805 231 6410
California, United States

A long-time car enthusiast and Southern California native, Matt studied Automotive Technology at San Diego Miramar College and complet... read more

Michael Squire

msquire@rmsothebys.com

+44 (0) 20 7851 7070
United Kingdom

Michael Squire joined RM Sotheby’s European Division in the summer of 2016. He comes to RM with a prestigious racing background ... read more

Mike Fairbairn

mfairbairn@rmsothebys.com

+1 519 352 4575
Ontario, Canada

As one of the three founding partners of RM Sotheby’s, Mike has a long-standing interest in the classic car industry. Graduating... read more

Oliver Camelin

ocamelin@rmsothebys.com

+44 (0) 75 0110 7447
United Kingdom

With an extensive background in exotic sports car history and sales, a particular passion for American curves, and fluency in three la... read more

Paul Darvill

pdarvill@rmsothebys.com

+44 (0) 20 7851 7070
United Kingdom

Paul Darvill joined the RM Sotheby’s European team at the beginning of 2015. Paul holds a degree in French and Politics from the... read more

Pete Fisher

pfisher@rmsothebys.com

+1 519 784 9300
Ontario, Canada

Pete Fisher was first introduced to antique cars in high school, working for Classic Coachworks in his hometown of Blenheim, Ontario. ... read more

Shelby Myers

smyers@rmsothebys.com

+1 310 559 4575
California, United States

Shelby Myers grew up with the classic car industry infused into every aspect of his life. He had the unique opportunity to watch the R... read more

Tonnie Van der Velden

tvandervelden@rmsothebys.com

+31 653 84 19 60
United Kingdom

Tonnie Van der Velden joined RM Sotheby’s European division in September 2015 as a Car Specialist. A lifelong enthusiast, Tonnie... read more