Makes › Lotus › 31 · Coachbuilt Ultra Rare
Lotus
31
Formula 3 car, 12 built.
Still being researched: why it matters, identification guide, full specifications. Everything shown is checked against the cited sources. Know more? Send us a source.
Photo: Hugh Llewelyn from Keynsham, UK · CC BY-SA 2.0
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Contents
01Overview
At a glance
- Built
- 12 Built
- Years
- Not yet verified
- Engine
- Ford Cosworth 109E · 997 cc / 1.0 LFactory: 997 cc
- Power
- 72.3 kW / 98.3 PSFactory: 97 hp · converted
- 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
Not yet documented. Have a source? Contribute it.
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.
| What is counted | Figure | Basis | Status |
|---|---|---|---|
| Total model productionLotus 31 built 1964-1965; the page says a further 19 cars were produced in 1966 | 121 | 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
Lotus introduced the Type 31 in 1964 as a one-litre Formula 3 car. It had a multi-tubular spaceframe similar to the Lotus 22 Formula Junior.
The source gives 12 examples built in 1964-65 and a further 19 in 1966. A few were used by Motor Racing Stables at Brands Hatch to train students in the art of racing. The 31 was not very competitive against the monocoque cars of 1964.
Variants
How each version differs from the standard 31.
No variants documented yet. Have a source? Contribute it.
03Specifications
Technical specifications
Engine
| Engine family | Ford Cosworth 109E2 Independently researched |
|---|---|
| Engine code | Not yet verified |
| Layout | Not yet verified |
| Displacement | 997 cc / 1.0 LFactory: 997 cc2 Independently researched |
| Bore | Not yet verified |
| Stroke | Not yet verified |
| Compression ratio | Not yet verified |
| Fuel system | Not yet verified |
| Power | 72.3 kW / 98.3 PSFactory: 97 hp · converted2 Independently researched |
| Power at | Not yet verified |
| Torque | Not yet verified |
Transmission & drivetrain
| Gearbox | Not yet verified |
|---|---|
| Gears | Not yet verified |
| Driven wheels | Not yet verified |
Chassis, body & dimensions
| Chassis | Multi-tubular spaceframe2 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
1964 Lotus 31 Level C
- 12 Lotus 31 built 1964-1965; the page says a further 19 cars were produced in 1966
-
2
Lotus Type 31 specifications and history Level C conceptcarz.com
- Fitted with a 997cc Ford Cosworth 109E
- the engine produced 97 horsepower
- It had a multi-tubular spaceframe
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