THE VEHICLE AT A GLANCE
Model dossier
- Production period
- 1925
- Body style
- Torpedo
- Type
- Limited
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 RLSS with the Castagna brushed aluminum body is a remarkable blend of history, design, and craftsmanship, making it one of the most notable examples of early 20th-century automotive excellence. The RL Super Sport, a product of Alfa Romeo’s engineering brilliance, was designed to deliver outstanding performance and elegance. Its association with Castagna, one of the most esteemed coachbuilders of the time, ensured that it was also a work of art on wheels. The brushed aluminum body created by Castagna for this model showcases an exceptional level of craftsmanship, with its sleek lines and lustrous finish reflecting the sophisticated styling of the period. Castagna’s work is renowned for its attention to detail, and this Alfa Romeo RL Super Sport is no exception. The choice of aluminum not only contributed to the car’s aesthetic appeal but also helped reduce weight, enhancing its performance on the road. The car’s ownership by Sir Sultan Mohammed Shah Aga Khan III adds a fascinating layer of prestige and historical significance. Aga Khan III, a prominent leader, philanthropist, and collector, was known for his taste in luxury and fine automobiles. His patronage of the Alfa Romeo RL Super Sport speaks to the vehicle’s high status and appeal to the elite of the time. His ownership imbues the car with a sense of exclusivity and further elevates its place in automotive history. Now housed in the Museo Storico Alfa Romeo, this RL Super Sport continues to be a symbol of Alfa Romeo’s engineering excellence and Castagna’s design mastery. It not only celebrates the legacy of its illustrious manufacturers but also serves as a testament to the remarkable figures who owned and cherished it. The car’s preservation in the museum ensures that future generations of automotive enthusiasts can admire its timeless beauty, learn about its distinguished past, and appreciate its place in the pantheon of automotive history. The Alfa Romeo RL Super Sport with its Castagna aluminum body remains a captivating symbol of luxury, performance, and craftsmanship, drawing admiration from all who encounter it. Its story continues to inspire awe and respect, making it a cherished relic of a bygone era of automotive artistry.
02 / TECHNICAL IDENTITY
Specifications & construction
Production & construction
- Production type
- Limited
- Production notes
- Exact CI history states Castagna supplied multiple RLSS commissions and that no comprehensive chassis register or exact Castagna production count is known. Legacy one-off/Units=1 cleared; model-level identity retained. NO_AUTO_INHERIT.
Engine & performance
- Specification notes
- Confidence detail moved from confidence: high_disposition_only
Design & manufacture
- Manufacturer · Documented
- Alfa Romeo
- Coachbuilder / Body Builder · Documented
- Castagna
04 / INDIVIDUAL HISTORY
Chassis & provenance
Ownership & provenance
- Ownership & history · Legacy attribution
- Museum Car · Royal Family
06 / EVENTS & AWARDS
Events & awards
No events or documented awards are currently recorded for this vehicle.
07 / THE VEHICLE IN DETAIL
Photo gallery 2 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 |
|---|---|
| Carrozzieri Italiani — Alfa Romeo RLSS Castagna www.carrozzieri-italiani.com | Exact vehicle editorial |
| Carrozzieri Italiani — Alfa Romeo RLSS Castagna museum car www.carrozzieri-italiani.com | Exact vehicle editorial secondary |











THE CONVERSATION
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