Rare Car Archive

Makes › Voisin France › C25 Aérodyne · Rare production · 1934–1935 Ultra Rare

Voisin
C25 Aérodyne

Streamlined C25 with retracting roof panels

Still being researched: identification guide, full specifications. Everything shown is checked against the cited sources. Know more? Send us a source.

Voisin C25 Aérodyne (Wikimedia Commons: Voisin Type C25 Aerodyne berline 1935 (chassis 50 023))
Voisin C25 Aérodyne (Wikimedia Commons: Voisin Type C25 Aerodyne berline 1935 (chassis 50 023))
Photo: Prova MO · CC BY-SA 4.0
7BuiltIndependently researched
0Chassis documentedin this archive
?SurvivingNot yet verified
Contents
  1. 01Overview
  2. 02Production & history
  3. 03Specifications
  4. 04Colours & options
  5. 05Individual cars
  6. 06Reference

01Overview

At a glance

Built
7 Built
Years
1934–1935
Engine
Front-mounted longitudinal straight six, Knight sleeve-valve · 2,994 cc / 3.0 LFactory: 2,994 cc
Power
67.1 kW / 91.2 PSFactory: 90 hp · converted
Top speed
130 km/hFactory: 130 km/h
Body
Not yet verified
Designer
Gabriel Voisin
In this archive
Not yet verified
Surviving
Not yet verified

Sources and any conflicting figures are in the sections below.

Why it matters

The C25 Aérodyne was Gabriel Voisin's answer to collapsing luxury-car sales in the early 1930s: rather than simplify, he built one of his most advanced designs. Its streamlined fastback body with a power-operated sliding roof made it one of the most striking French cars of the period, and only seven were built.

How rare is it?

Six separate kinds of rarity – never combined into one number.

Model rarityUltra Rare 7 · Built1
Specification rarityNot yet assessed
Colour rarityNot yet assessed
Individual rarityNot yet assessed
Historical rarityNot yet assessed
Survival rarityNot yet assessed

Each kind of rarity is rated separately and never combined.

02Production & history

Production

Every figure says what it counts.

What is countedFigureBasisStatus
Total model production"7 (including prototype)" 71 Factory production Independently researched

Independent counts (e.g. engine and colour) are never combined into a calculated figure. Surviving examples are never presented as original production.

History

The Aérodyne was previewed at the 1934 Paris Salon on a modified C24 chassis, styled by Gabriel Voisin alone after his split with André Telmont. Its fastback had an integrated boot and a roof that slid back using two vacuum pumps, with portholes that lined up with the rear window to keep rear vision. Power came from a Knight-patent sleeve-valve straight six; a seven-cylinder radial engine developed alongside was dropped after poor tests in early 1935. Seven cars, including the prototype, were built in 1934 and 1935.

Variants

How each version differs from the standard C25 Aérodyne.

No variants documented yet. Have a source? Contribute it.

03Specifications

Technical specifications

Engine

Engine familyNot yet verified
Engine codeM252 Independently researched
LayoutFront-mounted longitudinal straight six, Knight sleeve-valve2 Independently researched
Displacement 2,994 cc / 3.0 LFactory: 2,994 cc2 Independently researched
BoreNot yet verified
StrokeNot yet verified
Compression ratioNot yet verified
Fuel system2 Zenith 36 TH carburettors2 Independently researched
Power 67.1 kW / 91.2 PSFactory: 90 hp · converted2 Independently researchedSource states bhp.
Power at 3,800 rpm2 Independently researched
TorqueNot yet verified

Transmission & drivetrain

GearboxTwo-speed electromechanical gearbox with overdrive on both gears (4 forward speeds)3,2 Independently researched
Gears42 Independently researched
Driven wheelsNot yet verified

Chassis, body & dimensions

ChassisPressed-steel ladder frame with boxed rear section2 Independently researched
Front suspensionNot yet verified
Rear suspensionNot yet verified
BrakesHydraulic drums2 Independently researched
SteeringNot yet verified
Body constructionNot yet verified
WheelbaseNot yet verified
LengthNot yet verified
WidthNot yet verified
HeightNot yet verified
Front trackNot yet verified
Rear trackNot yet verified
Kerb weightNot yet verified
Dry weightNot yet verified

Performance

Maximum speed 130 km/hFactory: 130 km/h2 Independently researched
0–100 km/hNot yet verified
Fuel tankNot yet verified

“Not yet verified” means no source has been checked for that value yet. Nothing is estimated to fill a gap.

04Colours & options

Factory colours & interiors

Original paint and trim, with the number of cars in each where a source gives it.

Not yet documented. Have a source? Contribute it.

Factory options & codes

Codes are shown exactly as written by the manufacturer.

Not yet documented. Have a source? Contribute it.

05Individual cars

Chassis register

Every documented car, with its colours, history and where it is now. Open a row for the full record. Known chassis are not automatically authenticated originals.

Not yet documented. Have a source? Contribute it.

Competition history

Every race result of the individual cars, in date order. Click a chassis number to open its full record in the register.

Not yet documented. Have a source? Contribute it.

Auction & sale history

Documented public sales of the individual cars. Click a chassis number to open its full record in the register.

Not yet documented. Have a source? Contribute it.

See one in person

Museums where an example of this car can be seen.

No example is documented on public display yet. Have a source? Contribute it.

06Reference

Identification guide

How to tell an original from a replica or later conversion.

Not yet documented. Have a source? Contribute it.

Sources

Each number links to the exact facts it supports.

  1. 1
    1934 - 1935 Voisin C25 Aérodyne - Ultimatecarpage.com Level C
    • 7 "7 (including prototype)"
    Accessed 2026-11-11
  2. 2
    Voisin C25 Aérodyne specifications Level C Ultimatecarpage.com
    • M25 Straight 6
    • M25 Straight 6, front, longitudinally mounted, sleeve valves
    • 2,994 cc / 182.7 cu in
    • 2 Zenith 36 TH Carburettors
    • 90 bhp / 67 kW @ 3,800 rpm
    • 4 speed Semi-Automatic
    • 4 speed Semi-Automatic, rear wheel drive
    • Pressed-steel ladder frame with boxed rear section
    • Hydraulic drums
    • 130 km/h (81 mph)
    Accessed 2026-11-12
  3. 3
    1934 - 1935 Voisin C25 Aérodyne - Images, Specifications and Information Level C Wouter Melissen · Ultimatecarpage.com · 2013-08-12
    • two-speed electromechanical gearbox with overdrive on both gears
    Accessed 2026-11-12

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