Round 12, Estoril, Sunday, September 20th

The seventh win of the season had confirmed that the 1987 Championship title was looking increasingly like going to the Canon Williams Honda team.

Nelson Piquet had won in Italy and was 14 points ahead of Ayrton Senna (Camel Lotus Honda) and a further six points ahead of team-mate Nigel Mansell.

After about 4,000 kilometres of testing, Williams' new active suspension had been used by Piquet to win at Monza, and for Estoril he and Mansell would run their cars on it. But would it be as suitable on the relatively new circuit?

With nearly a third of the season still to go, there was plenty of time for the other teams to get cracking, and Ferrari's Michele Alboreto, plus Gerhard Berger along with Benetton's Thierry Boutsen and Teo Fabi were improving wholesale race-by-race.

The camera team for this superb video were on hand to capture the very best of the action on the circuit which was viewed by the competitors as being a real drivers' course - lots of corners only a couple of straights.

Mansell held the lap record at 120.22 mph, so it was not all that slow, and this recording enables the armchair enthusiast to see how the Portuguese Grand Prix turned out - detailing the full story at the push of a button.