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1933 Alfa Romeo 6C 1750 Spider / 10814313 Vehicle Information

1933 Alfa Romeo 6C 1750 photograph

1933 Alfa Romeo 6C 1750 photograph

1933 Alfa Romeo 6C 1750 photograph

1933 Alfa Romeo 6C 1750 photograph

1933 Alfa Romeo 6C 1750 photograph

1933 Alfa Romeo 6C 1750 photograph

1933 Alfa Romeo 6C 1750 photograph

1933 Alfa Romeo 6C 1750 photograph

1933 Alfa Romeo 6C 1750 photograph

1933 Alfa Romeo 6C 1750 photograph

1933 Alfa Romeo 6C 1750 photograph

1933 Alfa Romeo 6C 1750 photograph

1933 Alfa Romeo 6C 1750 photograph

1933 Alfa Romeo 6C 1750 photograph

1933 Alfa Romeo 6C 17501933 Alfa Romeo 6C 17501933 Alfa Romeo 6C 17501933 Alfa Romeo 6C 17501933 Alfa Romeo 6C 17501933 Alfa Romeo 6C 17501933 Alfa Romeo 6C 17501933 Alfa Romeo 6C 17501933 Alfa Romeo 6C 17501933 Alfa Romeo 6C 17501933 Alfa Romeo 6C 17501933 Alfa Romeo 6C 17501933 Alfa Romeo 6C 17501933 Alfa Romeo 6C 1750
Sold for $2,420,000 at 2015 RM Sotheby's : Amelia Island.
The quintessential pre-war Alfa Romeo, the Zagato-bodied 6C Gran Sport certainly inspired and set imaginations aflame with its simple, aggressive lines. It was, after all, such a lovely technical design that even the great Tazio Nuvolari and Achille Varzi would soon be behind the wheel of Alfas.

The Gran Sport would help to define the age. Developed by none other than the famous Vittorio Jano, the Gran Sport would be the fifth generation of the Sport that had its roots in the P2 of the mid-1920s.

In total, only 106 examples of the Gran Sports would be built. Chassis 10814313 would be the 13th example and would be one of just 76 that would be produced over the course of 1931. So, not only is this particular car one of the iconic pre-war Alfa Romeos, it is more exclusive than just that.

The 6C 1750 would reflect the improvements made to the car over time. Powered by a 1.75-liter supercharged inline six-cylinder engine developing some 85bhp, the 1750 Gran Sport would take Alfa Romeo to the top. Winning the Mille Miglia, Tourist Trophy and many other significant races of the period, there was no doubt as to the abilities of the car. And it would be this kind of performance that had caused Nuvolari and Varzi to drive for Alfa Romeo.

Though a point of conjecture, it is believed this particular example was constructed during the early part of 1931. Sporting bodywork by Zagato, 10814313 would not only be one of just 106 examples of the 6C 1750. Bearing spider coachwork, this particular car belongs in an even more select, but very desirable, troop.

Registered in the early 1930s, the car would later be found in Switzerland in the late 1940s. At that time, it would be owned by a student, Lucien Dorier. Dorier would sell the car in 1950 to a gentleman living nearby and would seemingly remain with that owner for decades before it became the property of Peter Groh sometime in the early 2000s.

Groh would set about having the car restored. This work would begin in 2005 and would take part, at least a good majority of it, right there in Switzerland. Still with its original engine and many other authentic components, a great deal of care would be taken to preserve the car's authenticity. When completed, the original engine, carburetor, gearbox, clutch, steering column, brakes, axles and electrical systems would be right where they had been assembled more than 70 years prior.

For more than 70 years the 1931 Alfa Romeo 6C 1750 had made its home in Europe. However, in 2011, when its current owner purchased the car, it made the journey to the United States and has remained, providing North America with a truly special piece of European automotive history.

Perhaps the greatest of the pre-war Alfas, highly original, remaining with its original engine and adorned in the coveted Zagato spider bodywork, 18014313 is a truly special and 'gran' Alfa Romeo Sport worthy of adoring praise and an experience never to be forgotten.

The 1931 Alfa Romeo 6C 1750 Gran Sport Spider, chassis 10814313, would be offered for sale as part of RM Auction's event in Amelia Island in March of 2015. Given its exclusiveness, links to such legends as Nuvolari, Varzi, Jano and Ferrari the car would garner pre-auction estimates ranging from between $2,300,000 and $2,600,000.

By Jeremy McMullen
Sold for $2,420,000 at 2015 RM Sotheby's : Amelia Island.
When Enzo Ferrari personally recruited the young engineer named Vittorio Jano in late 1923 FIAT, it marked a downturn for the Turin firm's fortunes and a coup de grace for Alfa Romeo. Jano's first project at Alfa Romeo was the new grand prix car, the P2, which was met with tremendous success and numerous victories. By 1926, Jano had succeeded Giuseppe Merosi as Alfa Romeo's head of design and was working on a touring car that was powered by a brand-new overhead-cam, 1.5-liter, inline six-cylinder engine. The 6C 1500 officially entered production in 1927, and the Sport Version, which followed a year later, was given a twin overhead cam that raised power by 10 horsepower. The Normale and Sport versions rested on a 114 inch wheelbase platform and were generally given saloon or four-seat tourer coachwork.

Alfa Romeo introduced their 6C 1500 Super Sport in 1929. With the help of the optional Roots supercharger, horsepower was increased to 76. During the two series of 6C 1500 production, which lasted until late 1929, only a small number of examples were produced. By this point, the displacement had been enlarged to 1752 cubic centimeters, resulting in the 6C 1750. The new 6C 1750 was produced in four more which were gradual improved over the next six years. During its production lifespan, nearly 2,600 examples were produced, many of which were equipped as the single-cam Turismo version (the replacement for the Normale) and were given Alfa's long 122-inch chassis. Produced in small numbers were the Sport models which had a 114-inch chassis and equipped with the twin-cam 1750 engine. Most of these cars were given Alfa saloon coachwork and were soon renamed Gran Turismo. The Super Sport examples had an even shorter platform, measuring 108-inches, and were available with finned alloy superchargers and intake manifolds. These cars were coachbuilt to individual customer order by coachhbuilders such as Castagna, Touring, and Zagato.

The Super Sport named was updated in 1930 to Gran Sport. These cars were given a sloping radiator that gave the vehicles a more rakish appearance and increased the surface area of the radiator for improved cooling. With the help of the Roots supercharger, horsepower power was rated at 85. In total, approximately 106 examples were produced before the introduction of the sixth and final series of cars in 1933.

This particular example is a 6C 1750 Gran Sport with Sport Spider coachwork by Zagato and chassis number 10814313. Factory records of the car were destroyed during World War II, but it is believed the car was constructed during March or April of 1931. This example is the 13th of approximately 106 examples of the fifth-series 6C 1750 Grand Sport.

It is believed that the car was first registered in Switzerland in 1933. By the late 1940s, it was in the care of a student in Geneva named Lucien Dorier. In June of 1950, Mr. Dorier sold the car to Guido Arioli, who lived in nearby Tinizong. It is believed the car has spent the majority of its life in Switzerland. By the 2000s, it was owned by Peter Groh, who had commissioned a substantial restoration, which began in 2005. The work was completed in April of 2009 with invoices totaling over 100,000 Swiss francs.

The current caretaker acquired the car in 2011 and had it imported to the United States. In 2012, it was shown at the Pebble Beach Concours d'Elegance where it competed in the European Classic : Sports Racing Class.

Since it has come into the current caretaker's possession, it has been used sparingly.


By Daniel Vaughan | May 2015
Sold for $2,420,000 at 2015 RM Sotheby's : Amelia Island.
The Alfa Romeo 6C 1750 was produced in six series from 1929 to 1933. A total of 2579 were built, of which about 360 were supercharged GS models. Most 6C 1750s were sold as rolling chassis and bodied by coachbuilders. Zagato was the mast of the Superleggera method of placing aluminum body panels over a small-gauge steel framework. The 6C 1750s gained an enviable reputation for speed and reliability and were entered in many races. Alfa Romeo's most famous victory came in the 1930 Mille Miglia when 1750s took the first four places, catapulting the Italian sports car into the history books.



2015 RM Sotheby's : Amelia Island

Pre-Auction Estimates :
USD $2,300,000-USD $2,600,000 
Sale Price :
USD $2,420,000

Recent Sales

(Data based on Model Year 1933 sales)
1931 Alfa Romeo 6C 1750 Gran Sport Spider by Zagato
Chassis#: 10814313
Sold for USD$2,420,000
  2015 RM Sotheby's : Amelia Island
1933 Alfa Romeo 6C 1750 image  1933 Alfa Romeo 6C 1750 image  

Vehicles That Failed To Sell

1933 Alfa Romeo 6C 1750's that have appeared at auction but did not sell.
VehicleChassisEventHigh BidEst. LowEst. High
1933 Alfa Romeo 6C 1750 GS 2016 Dragone Auction Greenwich Weekend Auction $1,100,000$1,300,000
1933 Alfa Romeo 6C 1750 Sixth Series Supercharged Gran Sport Cabriolet1212150372008 The Palace Hotel, Gstaad, Switzerland $700,000$850,000
1933 Alfa Romeo 6C 1750 2008 Bonhams & Butterfields Sale of Exceptional Motorcars and Automobilia $800,000$1,000,000

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Alfa Romeo 6C 1750 Gran Sport Vehicle Profiles

Chassis information for the Alfa Romeo 6C 1750 GS
1930 Testa Fissa Spyder
Coachbuilder: A.E. Leadbetter
Engine Num: 8513025

Chassis information for the Alfa Romeo 6C 1750 GS
1930 Spyder
Chassis Num: 0529
Chassis information for the Alfa Romeo 6C 1750 GS
1930 Drop Head Coupe
Coachbuilder: Castagna
Chassis Num: 121215033
Engine Num: 121215033

Chassis information for the Alfa Romeo 6C 1750 GS
1930 Spyder
Chassis Num: 8513033
Engine Num: 8513033
Chassis information for the Alfa Romeo 6C 1750 GS
1930 Spyder
Chassis Num: 8513045
Engine Num: 8513045

Chassis information for the Alfa Romeo 6C 1750 GS
1930 Spyder
Chassis Num: 8513053
Chassis information for the Alfa Romeo 6C 1750 GS
1930 Spyder
Chassis Num: 8513064
Engine Num: 8513064

Chassis information for the Alfa Romeo 6C 1750
1931 Zagato Spyder
Coachbuilder: Zagato
Chassis information for the Alfa Romeo 6C 1750
1931 Zagato Spyder
Coachbuilder: Zagato

Chassis information for the Alfa Romeo 6C 1750
1931 Zagato Spyder
Coachbuilder: Zagato
Chassis information for the Alfa Romeo 6C 1750
1931 Touring Spyder
Coachbuilder: Touring
Chassis Num: 10814320
Engine Num: 10814320

Chassis information for the Alfa Romeo 6C 1750
1931 Spider Corsa
Coachbuilder: Giuseppe Aprile
Chassis Num: 10814331
Chassis information for the Alfa Romeo 6C 1750
1931 Flying Star Spyder
Coachbuilder: Touring
Chassis Num: 10814341

Chassis information for the Alfa Romeo 6C 1750
1931 Zagato Spyder
Coachbuilder: Zagato
Chassis Num: 10814344
Chassis information for the Alfa Romeo 6C 1750
1931 Zagato Spyder
Coachbuilder: Zagato
Chassis Num: 10814349
Engine Num: 10814349

Chassis information for the Alfa Romeo 6C 1750
1931 Zagato Spyder
Coachbuilder: Zagato
Chassis Num: 10814356
Engine Num: 10814356
Chassis information for the Alfa Romeo 6C 1750
1931 Zagato Spyder
Coachbuilder: Zagato
Chassis Num: 10814358

Chassis information for the Alfa Romeo 6C 1750
1931 Zagato Spyder
Coachbuilder: Zagato
Chassis Num: 10814368
Engine Num: 10814368
Chassis information for the Alfa Romeo 6C 1750
1931 Cabriolet
Coachbuilder: Castagna
Chassis Num: 10914408

Chassis information for the Alfa Romeo 6C 1750
1931 Zagato Spyder
Coachbuilder: Zagato
Chassis Num: 6C 10814363
Engine Num: 10814383
Chassis information for the Alfa Romeo 6C 1750
1932 Spyder
Coachbuilder: Zagato

Chassis information for the Alfa Romeo 6C 1750
1932 Gran Sport
Coachbuilder: Figoni
Chassis Num: 10814377
Engine Num: 10814377
Chassis information for the Alfa Romeo 6C 1750
1932 Gran Sport
Coachbuilder: Zagato
Chassis Num: 10814400
Engine Num: 10814400

Chassis information for the Alfa Romeo 6C 1750
1932 Spyder
Coachbuilder: Zagato
Chassis Num: 10814402
Chassis information for the Alfa Romeo 6C 1750
1932 Spyder
Coachbuilder: Zagato
Chassis Num: 6C10814391

Chassis information for the Alfa Romeo 6C 1750
1933 Grand Sport Spider
Coachbuilder: Touring
Chassis information for the Alfa Romeo 6C 1750
1933 Spider
Coachbuilder: Zagato
Chassis Num: 10814313
Engine Num: 10814313

Chassis information for the Alfa Romeo 6C 1750
1933 Gran Sport Cabriolet
Coachbuilder: Castagna
Chassis Num: 121215037
Engine Num: 121215037
Chassis information for the Alfa Romeo 6C 1750
1933 Grand Sport Spider
Coachbuilder: Touring
Chassis Num: 121215050

Chassis information for the Alfa Romeo 6C 1750
1933 Coupe
Coachbuilder: Figoni
Chassis Num: 121215054

1933 Alfa Romeo 6C 1750

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