Makes › Williams › FW04 (1975) · Coachbuilt · 1975
Williams
FW04 (1975)
Formula One car described in older literature as a one-off.
Still being researched: identification guide, full specifications. Everything shown is checked against the cited sources. Know more? Send us a source.
Contents
01Overview
At a glance
- Built
- Not yet verified
- Years
- 1975
- Engine
- Ford Cosworth DFV
- Power
- Not yet verified
- Top speed
- Not yet verified
- Body
- Not yet verified
- Designer
- Not yet verified
- In this archive
- Not yet verified
- Surviving
- Not yet verified
Sources and any conflicting figures are in the sections below.
Why it matters
The FW04 was the first car of what became the Williams Grand Prix team. It was built for the 1975 season, when the team entered as an independent.
How rare is it?
Six separate kinds of rarity – never combined into one number.
Each kind of rarity is rated separately and never combined.
02Production & history
Production
Every figure says what it counts.
No production figures recorded yet.
History
Frank Williams Racing Cars entered the 1975 season as an independent team with the FW04. Arturo Merzario drove it at first, and Jacques Laffite took over for most of the rest of the season. Laffite finished second at the German Grand Prix. Patrick Head reworked the fuel and oil systems after early fuel pick-up problems and engine failures. A later privately entered chassis was campaigned in 1976.
Variants
How each version differs from the standard FW04 (1975).
No variants documented yet. Have a source? Contribute it.
03Specifications
Technical specifications
Engine
| Engine family | Ford Cosworth DFV1 Independently researched |
|---|---|
| Engine code | Not yet verified |
| Layout | Not yet verified |
| Displacement | Not yet verified |
| Bore | Not yet verified |
| Stroke | Not yet verified |
| Compression ratio | Not yet verified |
| Fuel system | Not yet verified |
| Power | Not yet verified |
| Power at | Not yet verified |
| Torque | Not yet verified |
Transmission & drivetrain
| Manufacturer | Hewland1 Independently researched |
|---|---|
| Gearbox | manual1 Independently researched |
| Gears | 51 Independently researched |
| Driven wheels | Not yet verified |
Chassis, body & dimensions
| Chassis | aluminium monocoque1 Independently researched |
|---|---|
| Front suspension | Not yet verified |
| Rear suspension | Not yet verified |
| Brakes | Not yet verified |
| Steering | Not yet verified |
| Body construction | Not yet verified |
| Wheelbase | Not yet verified |
| Length | Not yet verified |
| Width | Not yet verified |
| Height | Not yet verified |
| Front track | Not yet verified |
| Rear track | Not yet verified |
| Kerb weight | Not yet verified |
| Dry weight | Not yet verified |
Performance
| Maximum speed | Not yet verified |
|---|---|
| 0–100 km/h | Not yet verified |
| Fuel tank | Not 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
WILLIAMS FW04: WILLIAMS BEGINS Level C DriveTribe
- a Ford Cosworth DFV engine managed by a Hewland FG 400
- Hewland FG 400 five-speed manual transmission
- Equipped with an aluminium monocoque frame
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