I only have average speed for this section: El Herradón 10,86 km.(6.2 milles) and average speed: 113 km/h (70,4 milles per hour). It was the fastest section. I know these roads and are quite narrow indeed.
Edit: Jens, a friend of mine who competed in the Spanish Historics category (he finished 3rd in a 1969 911 S) told me that Carlos' top speed was about 190 - 200 km/h even with quite low gearing...:eek: that engine was quick!
Actually, the European FIA entry list had 24 cars: 14 Porsche 911 and 3 Lancia Rally 037!!