Makes › Hispano-Suiza › H6C › H6C "Boulogne" / short-chassis 'Monza' specification · Rare specification · 1924–1930 Ultra Rare
Hispano-Suiza
H6C "Boulogne" / short-chassis 'Monza' specification
Short sports chassis with 8-litre engine, named after Coupe Boillot wins at Boulogne
Still being researched: full specifications. Everything shown is checked against the cited sources. Know more? Send us a source.
Contents
01Overview
At a glance
- Built
- 13 Built
- Years
- 1924–1930
- Engine
- 8,000 cc / 8 LFactory: 8 L
- 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 short-chassis 'Monza' H6C was Hispano-Suiza's sporting chassis, built around the 8-litre H6C engine on a shortened, lowered frame. Perhaps as few as 13 were made, which makes surviving original chassis among the rarest Hispano-Suizas.
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 |
|---|---|---|---|
| Factory package productionshort-chassis H6Cs to this specification ('perhaps as few as 13', historian Johnnie Green) | 131 | 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
These chassis were seven inches shorter than the standard production H6 and set about eight inches lower, with double shock absorbers at each corner and an engine built to the 8-litre Type 56 H6C specification. One such car was the basis for the 1928 Indianapolis match race. The catalogued 1924 example retains its original short chassis but carries a 1975 recreation of a Kellner-style boattail body.
Variants
How each version differs from the standard H6C "Boulogne" / short-chassis 'Monza' specification.
No variants documented yet. Have a source? Contribute it.
03Specifications
Technical specifications
Engine
| Engine family | Not yet verified |
|---|---|
| Engine code | Not yet verified |
| Layout | Not yet verified |
| Displacement | 8,000 cc / 8 LFactory: 8 L2 Independently researched |
| Bore | Not yet verified |
| Stroke | Not yet verified |
| Compression ratio | Not yet verified |
| Fuel system | Triple Zenith carburettors2 Independently researched |
| Power | Not yet verified |
| 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 | Not yet verified |
|---|---|
| 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.
A genuine short-chassis car has a frame about seven inches shorter than a standard H6 chassis, sits roughly eight inches lower thanks to double shock absorbers at each corner, and has an 8-litre H6C-specification engine with triple Zenith carburettors. Many bodies are later recreations, so chassis originality matters more than coachwork.
Sources
Each number links to the exact facts it supports.
-
1
RM Sotheby's Monterey 2026, lot 128 – 1924 Hispano-Suiza H6C chassis 11452 Level B
- 13 short-chassis H6Cs to this specification ('perhaps as few as 13', historian Johnnie Green)
-
2
1924 Hispano-Suiza H6C Monza Speedster in the style of Kellner – Monterey 2026 Level B RM Sotheby's
- built to 8-liter Type 56 H6C specifications
- triple Zenith carburetors
