1975 Spanish Grand Prix
It was the 21st Spanish Grand Prix since the race was first held in 1913. It was the fourth, and last, Grand Prix to be held on the Montjuïc street circuit. The race was shortened to 29 of its scheduled 75 laps, a race distance of 109 kilometres. The race was won by German driver Jochen Mass driving a McLaren M23. It would be the only Formula One win of his career. Mass had just a second lead over the Lotus 72E of Belgian driver Jacky Ickx when the race was declared. Argentine racer Carlos Reutemann was declared third in his Brabham BT44B, a lap behind the race leaders after a penalty was given to Jean-Pierre Jarier. This was the final win by a German driver until Michael Schumacher won the 1992 Belgian Grand Prix.
1971 Formula One season
The Spanish Grand Prix in 1971 was held at the spectacularly fast and challenging Montjuic Park city street circuit in Barcelona; the year previous it was held at the tight and twisty Jarama permanent circuit near Madrid in 1970 as part of a rotation with the Catalan circuit. The Ferraris of Ickx and Regazzoni were 1-2 on the grid respectively, followed by Amon, Stewart, Rodriguez, Beltoise, Gethin and Andretti; 6 of the first 8 cars had 12-cylinder engines- a testament to the power needed to do well at Montjuic Park. The race was a rather different matter however, as Stewart made a lightning start to second place at the start, chasing Ickx. On lap six the Scot forced his way into the lead. Behind the leaders, Amon overtook Regazzoni for third place on lap 3, but then the order settled down. Stewart began to increase his lead over Ickx while Amon ran third; Regazzoni went out on lap 13 with a fuel pump failure which promoted Rodriguez to fourth place with Andretti fifth and Denny Hulme sixth in his McLaren-Ford. In the mid-race Andretti disappeared with an engine problem and so Hulme moved to fifth place and Beltoise took sixth. In the closing laps Ickx closed the gap to Stewart but he was still 3.4secs behind at the finish, ahead of Amon.