• by M. Vinci (Autodelta Italia Club)

The Lost sister of Ferrari -Part 2


In 1965, the Alfa Romeo Giulia GTA was introduced at the Amsterdam Motor Show and then at the Geneva Motor Show. This was a converted, mainly racing version of the Alfa Romeo Giulia GT launched two years earlier. The letter A stands for alleggerita (lightened) because 205 kg was shaved off the weight of the standard production model through the use of light alloy (Peraluman) outer panels fully riveted to the structure (without antinoise panels). The racing version weighed just 700 kg. It differs from the normal model in its twin ignition cylinder head (two spark plugs per cylinder). The car delivers a power output of 115 bhp at 6000 rpm for a top speed of more than 185 km/h on the road version that increases to 220 km/h for the racing version due to its higher power output of 170 bhp at 7500 rpm.

Autodelta Giulia GTA 1600cc Stradale

Autodelta GTA 1600cc Racing version at Balocco Circuit

The steel naked Chassis of Giulia GTA to completed with Aluminum panels

This 1600 cc model won the European Makes Challenge for three years running, from 1966 to 1968, and the Drivers' Challenge with Andrea De Adamich (1966 and 1967) and with Spartaco Dini (1968). Ignazio Giunti won the European Mountain championship in 1967. The GTA won innumerable successes during this three-year period, including wins abroad, in the US and in South America. The GTA's most prestigious accolades included 1st, 2nd and 4th places overall at the Nurburgring Six Hour race in 1967, and 1st and 2nd places overall in the Castle Rock-Colorado 250 Mile race. In 1966, the Giulia GTA won a major rally title: Arnaldo Cavallari and Dante Salvay went home with the Mitropa Cup. Again in 1966, Autodelta became an associate company of Alfa Romeo and Carlo Chiti became its director. From then on, Autodelta became Alfa Romeo's competitive wing for racing and the development of new technologies.

4 H Monza 1964 AUTODELTA GTA Roberto Bussinello-Jocken Rindt (64) De Adamich-Teodoro Zeccoli (63)

AUTODELTA GTA at Trans-Am

AUTODELTA GTA and Australian driver HORST KWECH at AMERICAN TRANS AM

AUTODELTA GTA 24H DAYTONA, 1967

AUTODELTA GTA WIN at AUSTRALIAN ATCC, 1967

In 1967, a turbocharged GTA prototype was built to compete in Group 5 races. The engine, developed by Autodelta, combined two coaxial centrifugal compressors, each with one oil-driven turbine pressurised by an axial pump connected to the engine by a chain. One other distinctive feature of the engine was the fact that it was water-cooled directly into the fuel ports to reduce the temperature of the mixture in the combustion chamber. The car's power output was 220 bhp and during tests at Balocco, this GTA identified by the initials SA (sovraalimentata - supercharged) exceeded 240 km/h. The car won the Hockenheim 100 mile race driven by the German driver Dau.

AUTODELTA GTA-SA, 1570cc Supercharged at Monza Circuit

AUTODELTA GTA-SA, J. Rindt car at Monza Show,1966

AUTODELTA GTA-SA, engine 1570cc with 2 Compressor

A 1300 cc aspirated version of the car was produced in 1968 to meet the needs of private drivers. The car, known as the GTA 1300 Junior Autodelta, was a no-holds-barred racing car that dominated its cylinder category for four years. The model succeeded in winning the outright European title in 1971 and 1972. The production run of the GTA 1300 Junior ran to 447 units. Racing versions prepared by Autodelta delivered a power output of 160 bhp at 8000 rpm.

AUTODELTA GTA 1300 Junior Racing version

AUTODELTA GTA 1300 Junior Stradale

AUTODELTA GTA Junior at Nurburgring

In 1970, the Dutchman Toine Hezemans won the title in an Alfa 1750 GT Am (Am stands for America), derived from the American version of the GT 1750 with Spica injection. The body came with broader wings to accommodate 13 inch wheels with a size 9 front channel and rear channel of up to 11. This car took on opposition such as BMW and Ford with significantly higher capacities but often managed to overcome its disadvantage to take the lead. The following year saw the arrival of the 2000 GT Am, a leading light in all races and often an outright winner. In 1970, the car surprised everyone to take the title at the Spa Francorchamps 24 Hour race, when it also won the Coupe du Roi for the best team. It went on to repeat its success for seven consecutive years to 1976. Some 40 units of the GT Am were built from Autodelta Factory and not defined other was prepared in kit assembly for Private Driver.

AUTODELTA 1750 GTAm

AUTODELTA 2000 GTAm wins at 24H le Mans 1971, 1th - 2th - 3th place Gr.2

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