1989 San Marino Grand Prix had 14 drivers and a 9.130 second gap between Stefano Modena and Volker Weidler (born March 18, 1962).
Ayrton Senna Alain Prost Alessandro Nannini Thierry Boutsen Derek Warwick Alex Caffi Eddie Cheever Johnny Herbert Nicola Larini Martin Brundle Luis Perez-Sala Mauricio Gugelmin Nelson Piquet Riccardo Patrese Pierluigi Martini Gerhard Berger Ivan Capelli Philippe Alliot Yannick Dalmas Michele Alboreto Christian Danner Roberto Moreno Gregor Foitek Stefan Johansson Joachim Winkelhock Pierre-Henri Raphanel Aguri Suzuki Bernd Schneider Volker Weidler 
