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Alfa Romeo 6C/Chassis Registry/1500/8513026 or 27

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Alfa Romeo 6C 1500 GS/SS chassis 851.3027 / 851.3026

Alfa Romeo 6C 1500 GS/SS chassis 851.3027 (possibly 851.3026) is a 1930 Spyder Cabriolet bodied by Zagato. Conflicting documentation exists regarding the correct chassis number.


Factory specification

  • Year: 1930
  • Model: Alfa Romeo 6C 1500
  • Variant: 6C 1500 GS or SS (uncertain)
  • Body style: Spyder Cabriolet
  • Chassis number: 851.3027 or 851.3026 (conflicting records)
  • Coachbuilder: Zagato
  • Exterior colour: Red
  • Interior: Black
  • Registration number: GH1557 (UK)
  • Engine type: Testa fissa
  • Pictures documented: Yes (BA-ARiP p.42, rear dustjacket)

Ownership history

Owner Location Notes
Boris Iwanowski — Competed in 1929 Irish Grand Prix
L.G. Firmin — Subsequent owner
Sanders United Kingdom VSCC Prescott competitor
Montagu Motor Museum United Kingdom Museum ownership, Nov 1962 – 1972
Subsequent ownership United States Later recorded location

Competition history

  • 1929 Irish Grand Prix – driven by Boris Iwanowski
  • VSCC Prescott – during Sanders ownership

Auction record

  • Christie’s – 1999
 Not sold at USD 440,000

Historical notes

Mentioned in Montagu Motor Museum documentation (see file). Illustrated in Batsford’s Sports Cars in Colour. Conflicting information remains regarding the correct chassis number (851.3027 vs 851.3026).


Registry classification

  • 6C 1500 GS/SS (uncertain)
  • Zagato-bodied example
  • Testa fissa engine
  • Irish Grand Prix participant

Chassis registry reference

See: Alfa Romeo 6C 1500/Chassis Registry