Rare Car Archive

Makes › Alfa Romeo Italy › 6C › 6C 1500 Super Sport / Testa Fissa · Rare specification · 1928–1929 Ultra Rare

Alfa Romeo
6C 1500 Super Sport / Testa Fissa

Twin-cam (and supercharged) Super Sport 6C 1500; 1928 Mille Miglia winner type

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

IDENTIFICATION CARD · ALFA ROMEO 6C 1500 SUPER SPORT / TESTA FISSA 1928–1929
No licensed photograph yet. Photographs are published only when their licence permits it.
31BuiltFactory reported
0Chassis documentedin this archive
3SurvivingIndependently researched
Contents
  1. 01Overview
  2. 02Production & history
  3. 03Specifications
  4. 04Colours & options
  5. 05Individual cars
  6. 06Reference

01Overview

At a glance

Built
31 Built
Years
1928–1929
Engine
Front-mounted, longitudinal inline six · 1,487 cc / 1.5 LFactory: 1,487 cc
Power
55.9 kW / 76 PSFactory: 76 PS
Top speed
140 km/hFactory: 140 km/h
Body
Not yet verified
Designer
Vittorio Jano
In this archive
Not yet verified
Surviving
3 (independently researched)

Sources and any conflicting figures are in the sections below.

Why it matters

The Testa Fissa was a special fixed-head racing engine built by the factory for its 6C 1500 works cars, avoiding cylinder-head gasket trouble in long races. A catalogue estimates that only about six 1500s received it in 1929-30, with larger valves and higher compression adding some 9 bhp over the detachable-head Super Sport. These cars were used by the works and by Scuderia Ferrari, and Enzo Ferrari is quoted as naming the Testa Fissa Gran Sport his favourite car.

How rare is it?

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

Model rarityNot yet assessed
Specification rarityUltra Rare 31 · Built1,2,3
Colour rarityNot yet assessed
Individual rarityNot yet assessed
Historical rarityNot yet assessed
Survival rarityNot yet assessed 3 · Surviving4

Each kind of rarity is rated separately and never combined.

02Production & history

Production

Every figure says what it counts.

What is countedFigureBasisStatus
Total model productionTesta Fissa-engined 6C 1500 cars said to be known to exist ('around three') 34 Surviving examples Independently researched
Factory package productionSuper Sport and Mille Miglia Speciale versions 1928–1929: 6 fixed-head, 10 supercharged, 15 unsupercharged 311,2,3 Factory production Factory reported

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

History

The 6C 1500 Sport was created in 1928 for competition, with a twin-overhead-camshaft head, higher compression and a twin-barrel carburettor. A supercharged single-carburettor Super Sport followed. On 1 April 1928 an official team car driven by Campari and Ramponi won the second Mille Miglia, the start of a long Alfa Romeo association with the race. Only 31 Super Sport and Mille Miglia Speciale cars were produced in 1928-29, including six with the fixed cylinder head.

Variants

How each version differs from the standard 6C 1500 Super Sport / Testa Fissa.

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

03Specifications

Technical specifications

Engine

Engine familyNot yet verified
Engine codeNot yet verified
LayoutFront-mounted, longitudinal inline six2
Cylinders62
Displacement 1,487 cc / 1.5 LFactory: 1,487 cc2
Bore 62 mmFactory: 62 mm2
Stroke 82 mmFactory: 82 mm2
Compression ratioNot yet verified
Valvetrain2 valves per cylinder, 2 overhead camshafts driven by shaft and bevel gears; iron block and head2
Fuel systemNot yet verified
InductionLobe-type positive-displacement supercharger2
Power 55.9 kW / 76 PSFactory: 76 PS2Rating: manufacturerMuseum figure for the 6C 1500 SS (31 built, 1928-1929) with detachable head; Christie's quotes 84 bhp at 5000 rpm for a Testa Fissa car (S2). Museum states CV, recorded as PS.
Power at 4,800 rpm2
TorqueNot yet verified

Transmission & drivetrain

GearboxNot yet verified
Gears42
Driven wheelsRear2

Chassis, body & dimensions

ChassisSteel sheet side members and cross members2
Front suspensionRigid axle, semi-elliptic leaf springs, friction dampers2
Rear suspensionRigid axle, semi-elliptic leaf springs, friction dampers2
BrakesMechanical, rear drums2
SteeringNot yet verified
Body constructionNot yet verified
Wheelbase 2,745 mmFactory: 2,745 mm2
Length 3,652 mmFactory: 3,652 mm2
WidthNot yet verified
HeightNot yet verified
Front trackNot yet verified
Rear trackNot yet verified
Kerb weight 840 kgFactory: 840 kg2Museum lists 'Peso' without stating the condition.
Dry weightNot yet verified

Performance

Maximum speed 140 km/hFactory: 140 km/h2
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
    Alfa Romeo 6C 1500 Super Sport Level A Stellantis Heritage
    • Only 31 Super Sport and Mille Miglia Speciale versions ... produced from 1928 to 1929
    Accessed 2026-11-12
  2. 2
    Museo Storico Alfa Romeo collection page: 6C 1500 Super Sport Level A Museo Storico Alfa Romeo, Arese
    • 31 (6C 1500 SS, 1928-1929)
    • 6 cilindri in linea
    • 1487 cc (62x82 mm)
    • doppio albero a camme in testa con comando ad alberino e coppie coniche
    • compressore volumetrico a lobi
    • 76 CV a 4800 giri/min.
    • 4 marce + RM
    • Trazione posteriore
    • Longheroni e traverse in lamiera di acciaio
    • Anteriore: assale rigido, balestre longitudinali
    • Posteriore: assale rigido, balestre longitudinali
    • Posteriori a tamburo, meccanici
    • Passo: 2745 mm
    • lunghezza: 3652 mm
    • Peso 840 kg
    • Massima velocità 140 km/h
    Accessed 2026-11-12
  3. 3
    Alfa Romeo 6C 1500 Super Sport – Heritage Hub Italy (Stellantis Heritage) Level A
    • 31 Super Sport and Mille Miglia Speciale versions 1928–1929: 6 fixed-head, 10 supercharged, 15 unsupercharged
    Accessed 2026-11-12
  4. 4
    c.1930 Alfa Romeo 6C-1500 Super-Sport (Supercharged) Testa Fissa Spyder Level C Christie's
    • Only around three 1500 models with this engine are known to exist
    Accessed 2026-11-12

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