Legacy Metrics

1958 AC Ace-Bristol Roadster

BEX 421roadUnited Kingdom
Engine
1,971cc inline-six with pushrod-operated inclined valves, up to 130 bhp in road trim; BMW five-speed gearbox fitted
Colour
Light blue metallic (repainted from earlier metallic green)

A left-hand-drive, Bristol-engined AC Ace roadster (chassis BEX 421) delivered new to Paris in May 1958, retaining its matching-numbers Bristol six-cylinder engine and later fitted with a BMW five-speed gearbox for long-distance touring, with the original gearbox retained. The car sustained front-end accident damage in Italy in the early 1960s and was subsequently rebuilt with a Zephyr-model front end. It passed through several French owners before spending nearly three decades with the founding president of the AC Club de France, who campaigned it extensively in European and international historic rallies including five Coupes des Alpes and three Tours Auto.

Ownership

  1. 2022-10-09Auction sale
    Sold €270,000 (≈ $297K)

    Bonhams catalogue lot →

  2. 2024-05-10Auction sale
    Estimate €270,000 – €350,000

    Bonhams catalogue lot →

  3. 1958-05-01 → 1958-05-14Factory delivery
    Ets Chardonnet
    full documentation

    Paris dealership that took initial factory delivery before registering the car to its first private owner.

  4. 1958-05-14 → 1963-03-01Factory delivery
    Jean Balaresque
    full documentation

    First private owner; took delivery in Paris with light blue metallic paint and red interior.

  5. 1963-03-01 → 1964Acquisition unknown
    Boutkil Abdelhouhab
    partial documentation

    Paris-based owner during whose tenure the car sustained front-end damage in an accident in Italy; bodywork was subsequently rebuilt using the Zephyr-model nose.

  6. 1964 →Private sale
    Nicolas Gilles
    partial documentation

    Purchased from Garage de Lorraine; later reacquired the car for a second period of ownership.

  7. 1964-03-01 → 1964Acquisition unknown
    Garage de Lorraine
    partial documentation

    Workshop that coordinated the front-end repair via Carrosserie Delvalet, then sold the car onward the same year.

  8. 1995-04-20 → 2022Private sale
    Alain Mauboussin
    full documentation

    Founding member of the AC Club de France and head of the Mauboussin jewellery house; acquired through intermediary Christophe Pund and used the car extensively in historic rallying over 27 years. Car repainted metallic green and later light blue metallic in 2006.

  9. Date unknownAcquisition unknown
    Nicolas Gilles (second period)
    partial documentation

    One of four subsequent owners after the 1964 sale; Gilles is noted as appearing twice in the chain of custody.

Competition

  1. 1998-05-01
    Louis Vuitton China Run Classic
    Driver: Alain Mauboussin

    Dalian-to-Beijing rally run in challenging conditions with no roadside infrastructure; a fuel tanker followed the field along with accompanying journalists.

  2. Coupe des Alpes (multiple editions)
    Driver: Alain Mauboussin

    Car participated in five editions of this event during the 1995–2022 ownership period.

  3. Tour Auto (multiple editions)
    Driver: Alain Mauboussin

    Three participations during the 1995–2022 ownership period.

  4. Transalpina Rally (multiple editions)
    Driver: Alain Mauboussin

    Among several rallies contested by Mauboussin during his long ownership.

  5. Z Trophy
    Driver: Alain Mauboussin

    Belgian historic event attended during the 1995–2022 ownership period.

  6. HVCB Rally
    Driver: Alain Mauboussin

    Belgian historic vehicle event attended during the 1995–2022 ownership period.

Maintenance & restoration

  1. 1964Bodywork
    Garage de Lorraine / Carrosserie Delvalet

    Front bodywork rebuilt following accident damage sustained in Italy; the repair used the slightly different nose section from the Ford Zephyr-engined variant, which the car has retained ever since.

    Work carried out in March 1964; the replacement front end is visually distinguishable from the standard Bristol-model nose.

  2. 2006
    Bodywork

    Exterior repainted twice: first to metallic green and subsequently returned to light blue metallic.

  3. Restoration
    J C de Penfentenyo

    Comprehensive restoration undertaken; a complete photographic record of this work is held in the car's history file.

    Carried out during the late 1980s; exact year not specified. Bills dating from 1989 onward are present in the documentation dossier.

  4. Modification

    Original Bristol BWCR9 gearbox replaced with a BMW five-speed unit to improve suitability for long-distance rallying; the original gearbox (number DID424) is retained and accompanies the car.

    Date of gearbox change not stated in the catalogue.

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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.