1931 Alfa Romeo 6C 1750 Gran Sport Spider (Zagato coachwork)
- Engine
- 1.75L DOHC supercharged inline-six, Roots blower, 85 bhp
A fifth-series Alfa Romeo 6C 1750 Gran Sport Spider, bodied by Zagato and believed constructed in early 1931, this car is the 13th of approximately 106 examples of its series and carries chassis number 10814313. Factory records were lost in the Second World War, but Swiss registration evidence and original documentation trace ownership from the 1930s onward. A comprehensive restoration completed in 2009, costing over 100,000 Swiss francs, brought the car to concours standard, and it was subsequently shown at the 2012 Pebble Beach Concours d'Elegance. Multiple original components, stampings, and Zagato body number 917 remain intact.
Ownership
- —Auction saleSold US$2,420,000
- → 1950-06-01Acquisition unknownLucien Dorierpartial documentation
Student based in Geneva; held the car by the late 1940s. Sold it in June 1950 per an original Swiss title document printed on silk.
- 1950-06-01 →Private saleGuido Ariolifull documentation
Salesman resident in Tinizong, Switzerland; purchase documented by the original Swiss silk-printed title.
- 2011 →Acquisition unknownCurrent consignorpartial documentation
Acquired the car in 2011 and relocated it from Switzerland to the United States; used it sparingly while maintaining it periodically.
- Date unknownAcquisition unknownPeter Grohpartial documentation
Swiss collector who owned the car by the 2000s and commissioned a thorough mechanical and cosmetic restoration beginning in 2005, completed in April 2009 at a cost exceeding 100,000 Swiss francs.
Competition
- 19291929 Mille MigliaDriver: Giuseppe Campari1st
One of five major victories for the 6C 1750 in 1929; cited as part of the model's broader competition success rather than specific to this chassis.
- 19301930 Tourist TrophyTop three positions taken by the model
Referenced as a model-level achievement rather than confirmed to this specific chassis.
- 19301930 Mille MigliaDriver: Tazio NuvolariTop three positions taken by the model
Described as a celebrated contest between Achille Varzi and Tazio Nuvolari; cited as a 6C 1750 model achievement rather than confirmed to this specific chassis.
- 20122012 Pebble Beach Concours d'Elegance
Car was accepted and exhibited in the European Classic: Sports Racing class, validating the quality and authenticity of its restoration.
Maintenance & restoration
- 2005RestorationIvo Buschor
Comprehensive restoration commissioned by owner Peter Groh, covering the engine, carburetor, gearbox, clutch, steering column, axles, brakes, fuel and electrical systems, bodywork, cockpit, instrument panel, and upholstery.
Work began in 2005 and was completed in April 2009; total invoiced cost exceeded 100,000 Swiss francs. Buschor was based in Schocherswil, Switzerland.
- 2009RestorationIvo Buschor
Restoration work concluded; body and interior fully disassembled and refinished, seats reupholstered, instrument panel refurbished.
Completion date per invoices on file; result described as concours-worthy presentation.
- —Service
Fluids replenished and basic mechanical servicing carried out to ensure reliable operation prior to sale.
Performed during the current consignor's ownership; car had been driven periodically to keep systems fresh.
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