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The Porsche 909 "Bergspyder" was a spyder sports car designed and built by Porsche in 1968 specifically for competing in hillclimbing competitions. It was a short lived model, but its basic design went on to become the successful 908/3.
Porsche had great success with earlier models, the 910, 907, and 908, they had won hillclimbing championships in 1966 and 1967, but in 1968 Ferrari announced that they had an all new lightweight car for competition, the 212E that was to race in 1969. Ferdinand Piëch immediately set out to develop a new model designed specifically to outdo Ferrari's new car. This focus resulted in the 909, sometimes called the "plastic Porsche". It was given the 2.0 L, 275 hp (205 kW) Type 771 flat-eight engine, and a lightweight chassis and body that resulted in the car only weighing in at 385 kg (849 lb).
Porsche's drivers preferred the 910 Bergspyder, which was a year older but still in use. For the 1968 year, between the 910 Bergspyder and the 909 Bergspyder, Porsche dominated the hillclimbing competitions. However in 1969 the Ferrari 212E dominated the 1969 European Hill Climb Championship, placing first in every race it entered and setting many course records. 
- Jonathan Thomson (November–December 1978), "212 E Montagna", Cavallino, vol. 1 no. 2, pp. 28–31
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