Legacy Metrics

1957 Porsche 356A Speedster

83100roadGermany
Engine
1.6L flat-four OHV, twin Weber 40 IDF carburetors, 90+ bhp at 5,500 rpm
Colour
White

This 1957 Porsche 356A Speedster, chassis 83100, was originally delivered through Autohaus Kahrmann in Fulda, Germany, in March 1957 and arrived in the United States in the early 1960s. It was raced in SCCA E Production by its first American owner and subsequently modified with Carrera-sourced racing components. Following a restoration in the mid-1980s that included fitment of a Super 90 engine with performance gearing, the car has remained well-documented throughout its life and retains a notably purposeful competition character.

Ownership

  1. 2024-02-29Auction sale
    Estimate US$285,000 – US$330,000

    Bonhams catalogue lot →

  2. 1957-03-27 → 1957Factory delivery
    Autohaus Kahrmann
    full documentation

    Frankfurt-area Porsche dealer that received delivery of the car; Kardex on file confirms the transaction date and original specification.

  3. → 1986-03-01Acquisition unknown
    Jerry Kendall
    partial documentation

    Atlanta-based owner who sold the car in March 1986.

  4. 1986-03-01 → 1994Private sale
    John Summer
    full documentation

    St. Petersburg, Florida owner responsible for the current restoration; replaced the Carrera engine with a 1960 Super 90 unit and specified performance drivetrain components including Weber carburetors, a hillclimb gearset, and a limited-slip final drive.

  5. 1994 →Private sale
    Kevin Fiske
    partial documentation

    Washington State owner who acquired the car from Summer in 1994.

  6. Date unknownAcquisition unknown
    Glenn Hoffmann
    partial documentation

    Harrisburg, Pennsylvania owner who campaigned the car in SCCA E Production, fitted a Carrera 1500 engine, added a lightweight Carrera rear deck and racing instrumentation, and applied Jennings-inspired burgundy scallop livery to the front fenders.

  7. Date unknownAcquisition unknown
    Bob Schreter
    partial documentation

    Roswell, Georgia owner who continued racing and hillclimbing the car through the late 1960s, reportedly winning frequently.

  8. Date unknownAcquisition unknown
    Milton Bailey
    partial documentation

    Atlanta, Georgia owner who acquired the car in the early 1970s, after which active competition use ceased.

  9. Date unknownAcquisition unknown
    Kevin Heaney
    partial documentation

    Atlanta-based owner; part of a sequence of local custodians during the car's post-racing period.

  10. Date unknownAcquisition unknown
    Jack Gray
    partial documentation

    Atlanta-based owner; held the car between Heaney and Kendall.

  11. Date unknownAcquisition unknown
    Long-term Massachusetts owner
    partial documentation

    Extended-tenure custodian based in Massachusetts who held the car after Fiske; numerous receipts and historical records accompany the vehicle.

Competition

  1. SCCA E Production
    SCCA E Production racing
    Driver: Glenn Hoffmann

    Car competed in club racing in Pennsylvania during the early 1960s; fitted with a Carrera 1500 engine and various racing equipment sourced partly from noted competitor Bruce Jennings.

  2. Hillclimb and road racing events
    Driver: Bob SchreterReportedly won frequently

    Georgia-based owner campaigned the Speedster in racing and hillclimb events through the late 1960s.

Maintenance & restoration

  1. 1986
    Restoration

    Full restoration undertaken, returning the car to its current white finish. The Carrera engine was removed and replaced with a 1960 Super 90 engine; performance upgrades including twin 40IDF Weber carburettors, a type 741 transaxle with hillclimb gearing, and a limited-slip final drive were fitted.

    Commissioned by John Summer following his purchase in March 1986; restoration records are included in the accompanying history file.

  2. Modification

    Original engine replaced with a 1500 Carrera unit; lightweight Carrera rear deck, high-rpm tachometer, and other racing components added, several sourced from racer Bruce Jennings.

    Carried out during Glenn Hoffmann's ownership in the early 1960s; decorative scallop paintwork in metallic burgundy also applied to front fenders at this time.

Are you the owner of this car?

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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.