'. . . In October 1967, Jo Siffert and his Swiss teammates had travelled to Monza to break some high-speed world distance records established by Ford and Toyota. Unfortunately, their Porsche 906’s suspension soon proved unable to survive long distances on the bumpy Italian circuit. To save the day, a Porsche 911 R was immediately despatched from Germany to take the place of the 906. That 911 R provided the Swiss team with five new long-distance world records – including the 20,000km at an average speed of 209km/h. Only later did the team discover that the engine of the record car was not a freshly refurbished unit, as they had thought, but one which had already spent 100 hours in a flat-out test round the factory’s test track at Weissach . . .'
https://www.classicdriver.com/en/art...htest-all-911s
Check-out the hood
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