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- Portugal
Presents an Alfa Romeo historic car, the 750 Competizione. A car that develop as a race car but never will be racing after test runs doesn't deliver the required results to make it happen. Only two prototypes were built and only one car is full running nowadays.
A remarkable car which may be seen as the closest historical car to the new Alfa Romeo 4C.
The 750 in the type name was a reference to the recently introduced Giulietta road car, which was known internally as the '750'. The sports racer was based very loosely on the Giulietta but most of the important components were either heavily modified or purpose-built. The chassis and body fell under the latter and were actually built by Abarth and Boano respectively. Serving mainly as external contractors, the two companies did follow the designs as laid down by Alfa Romeo.
Judging from the sophisticated chassis design, the 750 Competizione was certainly a serious project. The car used a boxed pressed steel platform chassis, which together with the sheet steel body formed a unitary construction. Considering the chassis type used, it was no surprise Abarth was called in to help with production as most of that company's cars also featured steel platform chassis. Carried over from the Giulietta, suspension was by double wishbones at the front and a live axle at the rear.
While Abarth built the chassis, the Alfa Romeo engineers focused on the design of the engine. This was a four cylinder based on the engine found in the Giulietta. For its new purpose, it received a slightly wider bore and a considerably longer stroke. As a result, the displacement increased from 1290 cc to 1488 cc. Breathing through two twin-choke Weber carburettors, the small 'four' produced an impressive 145 bhp at 8000 rpm. It was mated to a five speed gearbox.
Boano completed the 750 Competizione with a striking 'Spider' body that was distinctly different from all Alfa Romeos that came before or since. Somewhat similar to the designs Boano did for Abarth, the design included fenders with pronounced leading edges, particularly on the front of the car. Another typical Boano design element was the exposed exhaust that exited just behind front left wheel and ran parallel with the sill. The only real cue that the car was in fact an Alfa Romeo was the grille centre section.
Specifications
Engine
Configuration: Straight 4
Location: Front, longitudinally mounted
Construction: Light alloy block and head
Displacement: 1.488 liter / 90.8 cu in
Bore / Stroke: 76.0 mm (3 in) / 82.0 mm (3.2 in)
Compression: 10.0:1
Valvetrain: 2 valves / cylinder, DOHC
Fuel feed: 2 Weber Carburettors
Lubrication: Wet sump
Aspiration: Naturally Aspirated
Power: 145 bhp / 108 KW @ 8000 rpm
BHP/Liter: 97 bhp / liter
Drivetrain
Body: Unitary sheet steel body
Chassis: Boxed section pressed steel chassis
Front suspension: Double wishbones, coil springs
Rear suspension: Live axle, trailing arms, coil springs
Steering: Worm-and-roller
Brakes: Hydraulic drums, all-round
Gearbox: 5 speed Manual
Drive: Rear wheel drive
Dimensions
Weight: 690 kilo / 1521.2 lbs
Length: 3470 mm (136.6 in)
Width: N/A
Height: N/A
Wheelbase / Track (fr/r) 2120 mm (83.5 in) / 1220 mm (48 in) / 1240 mm (48.8 in)
Performance figures
Power to weight: 0.21 bhp / kg
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