Claim: The 1985 Belgian Grand Prix held on September 15 at Spa-Francorchamps was a Formula One motor race and there was only a 28-second difference between the fastest driver (Brazil's Ayrton Senna on a Lotus-Renault) and second fastest driver (UK's Nigel Mansell on a Williams-Honda) after 43 laps.
Evidence: The 1985 Belgian Grand Prix was a Formula One motor race held at Spa-Francorchamps on 15 September 1985. Brazil Ayrton Senna Lotus-Renault 1:34:19.893 43 United_Kingdom Nigel Mansell Williams-Honda 43 + 28.422