Alfa Romeo 6C 1750 Testa Fissa

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Description

The Alfa Romeo 6C 1750 Testa Fissa is one of the most exclusive and high-performance variants in the renowned 6C 1750 series, celebrated for its advanced engineering and motorsport success. “Testa Fissa,” which translates to “fixed head” in Italian, refers to the unique cylinder head design of this model, where the head and the engine block are cast as a single piece to improve rigidity and performance.

Introduced in the early 1930s, the 6C 1750 Testa Fissa was created with a focus on racing, making it a formidable contender in competitive motorsport. Its 1.75-liter inline-six engine was equipped with a supercharger, known as the “Compressore,” which significantly enhanced power output, reaching approximately 102 horsepower. This impressive performance allowed the Testa Fissa to achieve top speeds of over 100 mph, making it one of the fastest cars of its time.

The engine’s “fixed head” design was a significant innovation, reducing the likelihood of head gasket failure under high-stress conditions, a common issue in high-performance engines of the era. This design also improved the engine’s thermal efficiency and contributed to its reliability during endurance racing.

The 6C 1750 Testa Fissa’s chassis was a lightweight and rigid steel ladder frame, optimized for handling and agility. The suspension system, consisting of semi-elliptical leaf springs and hydraulic dampers, provided a balanced combination of comfort and control, essential for both road use and competitive racing.

The Testa Fissa models were often equipped with bespoke coachwork from prestigious Italian design houses such as Zagato, Touring, and Castagna. These custom bodies were designed with a focus on aerodynamics and weight reduction, featuring streamlined shapes that minimized air resistance and enhanced the car’s performance. The open two-seater body style was particularly popular for racing, offering minimal weight and maximum driver visibility.

Inside, the Testa Fissa maintained a minimalist, driver-focused cockpit, with essential instrumentation and controls positioned for easy access. The interior reflected the car’s racing pedigree, emphasizing functionality over luxury, although high-quality materials and craftsmanship were still evident in its construction.

The Alfa Romeo 6C 1750 Testa Fissa achieved significant success in motorsport, with notable victories in prestigious races such as the Mille Miglia and the Targa Florio. These achievements solidified Alfa Romeo’s reputation as a maker of fast, reliable, and beautifully designed sports cars.

Today, the 6C 1750 Testa Fissa is considered a rare and valuable classic, cherished by collectors for its engineering innovation, racing heritage, and the exquisite craftsmanship of its coachbuilt designs. Its legacy continues to inspire admiration and respect in the world of classic automobiles.

Additional information

Manufacturer

Alfa Romeo

Country

Italy

Production Started

1928

Production Stopped

1932

Vehicle Type

Bodystyle

Roadster

Number of Doors

0

Number of Seats

2

Top Speed

93 mph (150 kph)

0-60 mph (0-100 kph)

Power

56 / 76 / 75 @ 5500 rpm

Torque

Engine Manufacturer

Alfa Romeo

Engine

Inline 6

Engine Location

Front

Engine Displacement

1752 cc (106.4 cu in)

Valvetrain

DOHC

Valves per Cylinder

2

Bore / Stroke

65 x 88 mm (2.559 x 3.465 in)

Compression Ratio

5:1

Cooling System

Water

Charging System

Fuel Type

Petrol

Fuel System

Carburator

Aspiration

Supercharged, Roots

Fuel Capacity

Drive

Rear

Transmission

M4

Steering

Front Brakes

Rear Brakes

Front Suspension

Rear Suspension

Tyre Dimensions

Chassis

Weight

900 kg (1984 lb)

Length

4050 mm (159.4 in)

Width

1730 mm (68.1 in)

Height

1420 mm (55.9 in)

Wheelbase

2740 mm (107.9 in)