The Lotus 15 of Philip Walker and Miles Griffiths held off Carlos Monteverde and Gary Pearson's Lister Jaguar Knobbly to take victory in the 50s Sports Cars class at the Algarve Historic Festival from 19-20 October.
Tense action is assured at the helter-skelter mini-enduro by regs that command a minimum of two driver changes.
Although the podium reflected the starting grid, the race had a thrilling denouement after the second driver change when Walker left the pits a mere six seconds ahead of Pearson who was flying in the Lister.
Walker had the edge though and, once accustomed to the dark, actually managed to pull out a substantial lead in the final 20 mins of the race.
The best charge of the event, however, came from Dion Kremer in the Lotus 17 prototype. Having taken over the car from father Gabriel in ninth position for the final dash, Kremer guided it up to third for the chequer.
The two 30 mins Historic Touring Car Challenge races were rather more cut and dried with the team of Alex Buncombe and Andrew Smith winning both in the Ford Cologne Capri that Buncombe's father Jonathan raced in period.
Having been chased to the line by the Cologne Capri of Antonia Nogueira in the first, it was the turn of Dan and Robert Brown's Ford Escort, which withdrew from race 1, to play the bridesmaid for the second outing.
The Browns' effort was all the more astonishing because they had started from the back of the grid and had to battle past the Escort RS of dad Sean and car-hopping Robert Brown en route.
The undulating Portuguese circuit proved particularly tricky for the Pre-War Sports Cars and the competition got very interesting when favourite Fred Wakeman had mechanical woes in the first outing and limped his Frazer Nash Super Sports home in fifth, leaving the Bentley 3/4.5 of Richard Hudson and Stuart Morley to take the spoils and, just as importantly, pole position for race two.
It was by no means a two-car race, however, and Wakeman's path to glory was also blocked by the Bentley of Duncan Wiltshire and Clive Morley, carrying a 30 secs penalty from the first race.
A titanic battle ensued before the Frazer Nash squeezed past and eked out a lead to win.
Pictures: Eric Sawyer