THE VEHICLE AT A GLANCE
Model dossier
- Production period
- 1928
- Body style
- Berlina
- Engine
- 6 cilindri in linea — donor/base Fiat 521
- Type
- One-off
- Displacement
- 2,516 cc
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 Fiat 521 Berlina Boneschi is a distinguished one-off vehicle crafted by the Milanese coachbuilder Carrozzeria Boneschi. Unveiled at the Milan Auto Show in 1928, this unique model exemplifies the craftsmanship and innovation of Boneschi during the late 1920s. Built on the Fiat 521 chassis, the Berlina was a notable departure from standard production models of the time. The Fiat 521 itself was a reliable and well-regarded vehicle, known for its robust engineering and comfortable ride. However, Boneschi’s transformation of this chassis into a one-off Berlina showcased their expertise in custom coachbuilding and design. The Fiat 521 Berlina presented at the Milan Auto Show was distinguished by its bespoke bodywork, which highlighted the distinctive style and attention to detail characteristic of Boneschi. The vehicle featured a sleek and elegant design, with smooth lines and a refined silhouette that set it apart from more conventional automobiles of the era. The Berlina’s exterior design was both sophisticated and aerodynamic, reflecting the aesthetic sensibilities of the late 1920s. The interior of the Berlina was equally impressive, with a focus on luxury and comfort. The cabin was appointed with high-quality materials, including sumptuous leather upholstery and carefully crafted wood trim. The layout and design of the interior elements were tailored to provide an elevated driving experience, enhancing both driver and passenger comfort. The Fiat 521 Berlina Boneschi’s appearance at the Milan Auto Show was a significant event, showcasing the innovative capabilities of the Milanese coachbuilder. The Berlina’s unique design and craftsmanship drew considerable attention, highlighting Boneschi’s ability to create bespoke vehicles that were both visually striking and technically accomplished. As a one-off model, the Fiat 521 Berlina remains a rare and valuable piece of automotive history. Its custom design and the prestige of its presentation at the Milan Auto Show contribute to its status as a cherished collector’s item. The vehicle represents a notable example of the bespoke coachbuilding tradition in early 20th-century Italy, reflecting the high standards and creativity of Carrozzeria Boneschi.
Historical research note
CI's Boneschi archive contains a 1928 Fiat 521 Berlina Boneschi entry. The Fiat 521 was widely supplied as coachbuilder chassis, making the body type historically plausible, but no independent chassis-level source has yet been recovered for this specific Boneschi car.
Source: SRC-CI-BONESCHI-ARCHIVE-PAGE13 · DOC-CI-BONESCHI-ARCHIVE-FIAT521 · Catalog/body identity; exact chassis unresolved · Knowledge Facts r693 · Historical information awaiting independent verification.
02 / TECHNICAL IDENTITY
Specifications & construction
Production & construction
- Production type
- One-off
- Production notes
- Independent Coachbuild period-photo evidence corroborates a Boneschi Fiat 521 at the 1928 Milan Auto Show. Exact chassis and production quantity remain open; do not generate one-off or survivor claims.
Engine & performance
- Engine configuration
- 6 cilindri in linea — donor/base Fiat 521
- Displacement
- 2,516 cc
- Specification notes
- DONOR_BASE_PROJECTION — base-model technical fields projected from PF-FIA-521-CABRIOLET-PF-COACHWORK-1933 because make/model/year match exactly. This does not assert that the coachbuilt/special vehicle retained identical tuning or performance.
Design & manufacture
- Coachbuilder / Body Builder · Documented
- Boneschi
- Manufacturer · Documented
- Fiat
06 / EVENTS & AWARDS
Events & awards
Milano General · legacy_preserved
- Date
- 1928
- Chassis
- General
Preserved CI 1.0 relation. Evidence field: _yoast_wpseo_primary_events. No award inferred.
07 / THE VEHICLE IN DETAIL
Photo gallery
No publishable photographs are currently catalogued for this vehicle.
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 |
|---|---|
| www.coachbuild.com www.coachbuild.com | Independent period photo forum |











THE CONVERSATION
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