Horsepower is important at Spa and the Williams didn't have a lot of it, so Keke Rosberg had to make up the difference in other ways
Unlike today, back in 1983 Eau Rouge was still a fearsome corner, but Keke Rosberg didn’t care. He was too busy trying to force his naturally-aspirated and largely outclassed Williams to keep up with the turbo-powered cars, which were now well established as the thing to have.
In the early stages of the race, Keke hurled his car through the corner at ridiculous speeds - and it looked incredibly spectacular.
It was too much for him to maintain though and he slipped back, eventually finishing in something of a lonely fifth - but still comfortably the highest-placed non-turbo car.