Legacy Metrics

1975 Alfa Romeo Giulia GTA 1300 Junior Stradale

AR776050roadItaly
Engine
1.75L DOHC twin-plug inline-four, twin Weber twin-choke carburetors, ~150 bhp at 6,200 rpm
Colour
'Biancospino' (white/hawthorn) with green script

A 1975 Alfa Romeo Giulia GTA 1300 Junior in rare road-going Stradale specification, finished in Biancospino white with green script over a black interior. Factory records confirm completion on 14 April 1975. The car retains its original Bertone aluminium bodyshell, which underwent a thorough bare-metal restoration approximately fifteen years ago. A high-performance 1,750cc twin-plug engine was fitted at that time, while the matching original engine was rebuilt and crated for preservation. The car has participated in classic rallies and concours events but has no racing history.

Ownership

  1. 2023-01-27Auction sale
    Estimate US$225,000 – US$275,000

    Bonhams catalogue lot →

  2. Date unknownAcquisition unknown
    Long-term European sports car collector (consignor)
    full documentation

    Renowned lifetime collector of European sports cars who held the car for over three decades. During this tenure a bare-metal restoration was completed roughly fifteen years ago, and a high-performance 1,750cc twin-plug engine was fitted by John Anderson of Jon Norman Racing while the original unit was preserved.

Competition

  1. Classic car rallies (unspecified)

    The car participated in an unspecified number of classic car rallies during current ownership; no individual events named in the catalogue.

  2. Concours d'Elegance events (unspecified)

    The car was shown at one or more concours events during current ownership; no specific events or results mentioned.

Maintenance & restoration

  1. Restoration

    Full ground-up bare-metal restoration of the original aluminium Bertone bodyshell, documented extensively in a restoration album with photographs confirming the shell's cleanliness and originality.

    Carried out approximately fifteen years before the catalogue date, under the current long-term owner.

  2. Engine rebuild
    Jon Norman Racing

    A high-performance 1,750cc twin-plug four-cylinder engine was assembled and installed in place of the original unit. The factory-matching original engine was separately rebuilt, preserved, and crated for storage alongside the car.

    Engine built by John Anderson, described as an Alfa Romeo G production champion, operating under the Jon Norman Racing name. The original engine is included with the sale.

  3. Inspection

    A compression test carried out shortly before the catalogue date returned strong and consistent readings across all four cylinders.

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Each chassis record is compiled from public auction archives and links to its source material. Ownership, competition and maintenance entries are extracted from those catalogue listings by an LLM, which can make mistakes — please contact us with any corrections. The summary is Legacy Metrics’ own writing; we do not reproduce catalogue text.

“Full” and “partial” documentation labels indicate how well each entry is corroborated in the underlying sources, not an audit of the car’s physical paperwork. Names of recent or living owners are withheld for privacy.