THE VEHICLE AT A GLANCE
Model dossier
- Manufacturer
- Alfa Romeo
- Base model
- 6C 1750 GTC
- Coachbuilder
- Castagna
- Production period
- 1931
- Body style
- Cabriolet
- Engine
- Supercharged Inline-6
- Type
- Limited
- Displacement
- 1,752 cc
- Power
- 80 CV
- Top speed
- 135 km/h
THE PEOPLE BEHIND THE CAR
Coachbuilding, design & conversions
PRICE & SALES RECORD
Vehicle value
- Original price
- Not documented
- Latest recorded sale
- Not documented
01 / THE STORY
History & context
The Alfa Romeo 6C 1750 GTC Castagna is a remarkable fusion of performance and luxury, a true testament to Alfa Romeo’s legacy in both motorsport and high-end automobile design. Originally born out of the genius of Vittorio Jano, the 6C 1750 played a pivotal role in cementing Alfa Romeo’s reputation in the racing world, with victories in the prestigious Mille Miglia from 1928 to 1930. The 6C 1750 GTC marks the final evolution of this iconic sports car, transitioning into a refined touring version that catered to a select group of connoisseurs who appreciated its potential for both exhilarating performance and comfortable touring. The GTC model is notable for its extended wheelbase, which was lengthened by 6 cm compared to earlier iterations. This modification enhanced the car’s stability, making it more suited to long-distance driving without compromising its agility. The GTC retains the mechanical excellence of the 8C 2300, with shared components such as the gear lever and front axle, while also benefiting from improved braking systems for better handling and safety. The real standout feature of the 6C 1750 GTC Castagna is its stunning bodywork, masterfully crafted by Carrozzeria Castagna Milano. This coachbuilder, known for its elegant designs, created a body that balanced the car’s sporting heritage with the sophistication of a luxury tourer. The car’s distinctive capote (hood) and luggage rack are both functional and beautifully detailed, adding to the overall aesthetic appeal. Perhaps the most striking feature is its unique pearl-colored varnish, a combination of pearl dust and crushed shells that results in a luminous, almost otherworldly finish. This bespoke paintwork gives the car a rare, ethereal quality that elevates it beyond just a mode of transportation to an automotive masterpiece. The Alfa Romeo 6C 1750 GTC Castagna has earned numerous accolades, including the “Prix d’Elégance” at the 2001 Louis Vuitton Classic, further solidifying its place among the most exquisite cars of its era. Today, it resides in the prestigious Museo Nicolis Collection, where it continues to captivate car enthusiasts and collectors alike, showcasing the enduring beauty and engineering excellence that define Alfa Romeo’s legacy.
02 / TECHNICAL IDENTITY
Specifications & construction
Production & construction
- Production type
- Limited
Engine & performance
- Engine configuration
- Supercharged Inline-6
- Displacement
- 1,752 cc
- Power (CV)
- 80 CV
- Engine speed
- 4,400 rpm
- Transmission
- 4-speed manual
- Drive
- Rear-wheel drive
- Top speed
- 135 km/h
- Specification notes
- Confidence detail moved from confidence: high_disposition_only. High-confidence body-specific baseline from Museo Nicolis and Ruoteclassiche: supercharged inline-six 1752 cc, 80 CV at 4400 rpm, 4-speed manual, RWD, wheelbase 3160 mm, dimensions 4580 × 1720 × 1490 mm, top speed about 135 km/h.
Dimensions & accommodation
- Wheelbase
- 3,160 mm
- Length
- 4,580 mm
- Width
- 1,720 mm
- Height
- 1,490 mm
Design & manufacture
- Manufacturer · Documented
- Alfa Romeo
- Coachbuilder / Body Builder · Documented
- Castagna
04 / INDIVIDUAL HISTORY
Chassis & provenance
Ownership & provenance
- Ownership & history · Legacy attribution
- Museum Car
06 / EVENTS & AWARDS
Events & awards
No events or documented awards are currently recorded for this vehicle.
07 / THE VEHICLE IN DETAIL
Photo gallery 4 photographs
08 / FROM THE ARCHIVE
Archive
References held in the vehicle dossier. Their inclusion does not establish that every historical claim has been independently verified.
| Reference | Source type |
|---|---|
| Museo Nicolis — Alfa Romeo 6C 1750 GTC Castagna, 1931 www.museonicolis.com | Museum vehicle record |
| Ruoteclassiche — Alfa Romeo 6C 1750 GTC Castagna porschecarshistory.com | Specialist historical technical reference |











THE CONVERSATION
Comments 0
Share a memory, a period photograph or a documented detail about this car.