Makes › Alfa Romeo › 12C-37 · Factory competition · 1937 Ultra Rare
Alfa Romeo
12C-37
Experimental Grand Prix car by Vittorio Jano with an enlarged 4.5-litre V12 in a new tubular chassis; four were 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: Norbert Schnitzler · CC BY-SA 2.0
Contents
01Overview
At a glance
- Built
- 4 Built
- Years
- 1937
- Engine
- V12, 60 degree, Roots supercharger · 4,495 cc / 4.5 LFactory: 4,495 cc
- Power
- 321 kW / 436 PSFactory: 430 hp · converted
- Top speed
- Not yet verified
- Body
- Not yet verified
- Designer
- Vittorio Jano
- 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 production12C-37 cars built (1937) | 41 | 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 12C-37 was an experimental car built by Jano for the 750 kg Grand Prix formula, introduced at Pescara in August 1937. It combined an enlarged V12 with a completely new tubular frame and a lower, more streamlined body with the fuel in a saddle tank. Alfa Corse entered it in the 1937 Coppa Acerbo. Its chassis was reused for the 312 and 316 of 1938, and in 1947 Varzi was offered a 312 rebuilt with the original 12C-37 engine rebored to 4.6 litres.
Variants
How each version differs from the standard 12C-37.
No variants documented yet. Have a source? Contribute it.
03Specifications
Technical specifications
Engine
| Engine family | Not yet verified |
|---|---|
| Engine code | Not yet verified |
| Layout | V12, 60 degree, Roots supercharger2 Independently researched |
| Displacement | 4,495 cc / 4.5 LFactory: 4,495 cc2 Independently researched |
| Bore | 72 mmFactory: 72 mm2 Independently researched |
| Stroke | 92 mmFactory: 92 mm2 Independently researched |
| Compression ratio | Not yet verified |
| Fuel system | Not yet verified |
| Power | 321 kW / 436 PSFactory: 430 hp · converted2 Independently researched |
| Power at | Not yet verified |
| Torque | Not yet verified |
Transmission & drivetrain
| Gearbox | 4-speed gearbox integral with rear axle2 Independently researched |
|---|---|
| Gears | Not yet verified |
| Driven wheels | Not yet verified |
Chassis, body & dimensions
| Chassis | tubular frame2 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 | 280 cmFactory: 280 cm2 Independently researched |
| 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
-
2
Alfa Romeo cars (part 1) Level B Leif Snellman, Golden Era of Grand Prix Racing
- 12 cyl 60 72 * 92mm 4495cc Roots supercharger 430 BHP
- 4495cc
- 72 * 92mm
- Roots supercharger 430 BHP
- 4 speed gearbox integral with rear axle
- Chassis: tubular frame
- wheelbase: 280 cm
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