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Alfa Romeo History

1929 Alfa Romeo 6C 1750

Chassis number : 0312901

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Sold for $836,000 at 2014 Gooding & Company : Pebble Beach Concours.
Sold for $692,500 at 2021 RM Sothebys : Monterey.
Vittorio Jano joined Alfa Romeo in 1923. His first creation at Alfa was the P2, which enjoyed much success on the Grand Prix circuits, and was largely based on Jano's experience with Fiat's Tipo 805 Grand Prix car of 1923.

The Alfa Romeo P2 was followed by a line of passenger cars to succeed the Giuseppe Merosi-designed RL and RM. Merosi's L-head 6- and 4-cylinder cars - by this point in history - had become dated and required a replacement. Jano responded with a 1.5-Litre six-cylinder that set new standards for lightweight high-performance motorcars, the 6C 1500. The iron cylinder block and head were each single piece castings. The block is mated to a light alloy crankcase. It was initially a single camshaft design; Jano added a twin-cam head, designated 'Sport', and used for performance applications. A shaft and bevel gear drive was used for the 6C's cams. In its basic 'Sport' configuration, the 6C 1500 produced 54 horsepower at 4500 RPM. The series eventually grew to 1900 CC and power - with the help of a supercharger - rose to over 85 horsepower.

The chassis was lightweight and low-to-the-ground. It was given a semi-elliptical spring setup that passed through the front axle. The 6C 1500 in its naturally aspirated and supercharged versions would go on to claim numerous victories over much larger and more powerful machinery. Among the successful 6C 1500 pilots was Enzo Ferrari who, at the time, was employed by Alfa.

In 1929, Jano's 6C was increased in displacement to 1752cc by increasing both bore and stroke from 62mm x 82mm to 65mm x 88mm.

This 1929 Alfa Romeo 6C 1750 SS 'Super Sport' Two Seater wears coachwork by Touring. It is a 3rd Series 1750 SS that spent over a half-of-century in the Southern Hemisphere where it resided in South Africa in the care of enthusiast Hugh Gearing. Its early years included competition in Italy and South Africa.

In the late 1930s, it was sold to a U.K. resident and received the coachwork that it wears today.

In the post-War era, the car was purchased by Hugh Gearing. Gearing continued its racing career, and on one occasion, it was loaned to Juan Manual Fangio to drive at a South African event.

The car has fully valanced front fenders and opening hood vents. Many of the mechanical components are original. The supercharger, however, has been replaced with another correct early version.

This 1929 Alfa Romeo 6C 1750 SS 'Super Sport' Two Seater wears coachwork by Touring. It is a 3rd Series 1750 SS that spent over a half-of-century in the Southern Hemisphere where it resided in South Africa in the care of enthusiast Hugh Gearing. Its early years included competition in Italy and South Africa.

In the late 1930s, it was sold to a U.K. resident and received the coachwork that it wears today.

In the post-War era, the car was purchased by Hugh Gearing. Mr. Gearing continued its racing career, and on one occasion, it was loaned to Juan Manual Fangio to drive at a South African event. In November of 2012, it was acquired by its current caretaker who submitted it to Automotive Restorations, Inc. of Stratford, Connecticut for a complete and accurate mechanical restoration. Specialists from David L. George Historic Motorcars of Cochranville, Pennsylvania, were commissioned to execute the rebuild of the supercharger.

The car was shown in 2015 at The Elegance at Hershey Concours where it was crowned the 'Most Elegant Sports and Racing Car' in attendance. In September 2017, this stunning 6C 1750 was awarded 'Best in Class' in the 'Pre-World War II Coachbuilt' category at the Lime Rock Park Historic Concours. Later that same month, the Alfa again proved an award-winning entrant when it was anointed with 'Best in Italian Class' honors at the Boston Cup.

The car is currently finished with a black exterior over a cognac leather interior and rides on matching black wire wheels. It is one of 121 Super Sport examples produced and is powered by a numbers-matching 1.75-liter, straight six-cylinder supercharged engine paired to a four-speed manual gearbox of the period. The engine features a later-series Memini carburetor and although these items (carburetor and gearbox) are of a later series, they are believed to have been common, early improvements were were already present on the car when Gearing acquired it.


By Daniel Vaughan | Oct 2014

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2021 RM Sothebys : Monterey

Pre-Auction Estimates :
USD $800,000-USD $900,000 
Sale Price :
USD $692,500

2015 Barrett-Jackson - Scottsdale

Lot was not sold

2014 Gooding & Company : Pebble Beach Concours

Pre-Auction Estimates :
USD $1,400,000-USD $1,900,000 
Sale Price :
USD $836,000

2009 Greenwich Concours d'Elegance, Collectors' Motorcars and Automobilia

Lot was not sold

1929 Alfa Romeo 6C 1750 Auction Sales

Recent Sales of the Alfa Romeo 6C 1750

(Data based on Model Year 1929 sales)
1929 Alfa Romeo 6C 1750 Super Sport
Chassis#: 0312901
Sold for USD$692,500
  2021 RM Sothebys : Monterey
1929 Alfa Romeo 6C 1750 image  1929 Alfa Romeo 6C 1750 image  
1929 Alfa Romeo 6C 1750 Turismo by James Young
Chassis#: 0411875
Sold for USD$252,554
  2015 Historics at Brookland
 
1929 Alfa Romeo 6C 1750 SS Spider
Chassis#: 0312901
Sold for USD$836,000
  2014 Gooding & Company : Pebble Beach Concours
1929 Alfa Romeo 6C 1750 image  1929 Alfa Romeo 6C 1750 image  
1929 Alfa Romeo 1750 SS Competition Tourer
Chassis#: 0312906
Sold for USD$1,782,372
  2012 Bonhams - Collectors' Motor Cars and Automobilia
 
1929 Alfa Romeo 6C 1750 SS Supercharged Spyder
Chassis#: 0312897
Sold for USD$582,008
  2012 Bonhams - Collectors' Motor cars and Automobilia at Goodwood
 
1929 Alfa Romeo 6C 1750 Turismo
Chassis#: 6C0412061
Sold for USD$171,304
  2011 RM Auctions - London
 
1929 Alfa Romeo 6C 1750 GS
Sold for USD$854,340
  2009 RM Auctions - Automobiles of London
 
1929 Alfa Romeo 6C 1750 3rd Series Turismo Drop Head Coupe
Chassis#: 0412061
Sold for USD$143,000
  2009 Pebble Beach Auction : Gooding & Company
1929 Alfa Romeo 6C 1750 image  1929 Alfa Romeo 6C 1750 image  

Alfa Romeo 6C 1750s That Failed To Sell At Auction

1929 Alfa Romeo 6C 1750's that have appeared at auction but did not sell.
VehicleChassisEventHigh BidEst. LowEst. High
1929 Alfa Romeo 6C 1750 Supercharged Super Sport Spider03129312019 Bonhams : The Bond Street Sale $800,000$1,200,000
1929 Alfa Romeo 6C 1750 SS 3e série Zagato03129552018 Artcurial : Retromobile $900,000$1,300,000
1929 Alfa Romeo 6C 1750 3e série Turismo par James Young6C 04120612017 Artcurial : Retromobile $210,000$250,000
1929 Alfa Romeo 6C 1750 Super Sport Supercharged Spider03128612016 Bonhams : The Monaco Sale $1,800,000$2,400,000
1929 Alfa Romeo 6C 1750 Super Sport03129052016 Rétromobile 2016 by Artcurial Motorcars $1,350,000$1,550,000
1929 ALFA ROMEO 6C 1750 SS03129012015 BarrettJackson Scottsdale   
1929 Alfa Romeo 6C 1750 Spyder Supersport03129612011 Bonhams Automobilia, Motos de collection et Automobiles d'exception au Grand Palais $750,000$950,000
1929 Alfa Romeo 6C 1750 SS Super Sport Two Seater03129012009 Greenwich Concours d'Elegance, Collectors' Motorcars and Automobilia   

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1929 Alfa Romeo 6C 1750 Profiles

1929 Alfa Romeo 6C 1750 vehicle information
Spyder
Coachwork: Carrozzeria Sport SA
1929 Alfa Romeo 6C 1750 vehicle information
Spyder
Coachwork: Zagato
1929 Alfa Romeo 6C 1750 vehicle information
Spyder
Coachwork: Touring
Chassis #: 0312901
Engine #: 0312901
1929 Alfa Romeo 6C 1750 vehicle information
Turismo Drophead Coupe
Coachwork: James Young
Chassis #: 0412061
Engine #: 0412294
1929 Alfa Romeo 6C 1750 vehicle information
Spyder
Coachwork: Zagato