According to many he is Dutch most all-round driver.
Besides Formula 1 he drove amongst others also Formula 3, IMSA, F3000, IndyCars, Sportcars, Le Mans, Dakar, GT series and BTCC. In Formula 1 Jan performed several tests (Lotus, Brabham, Toleman), andd drove for different teams (Shadow, Theodore, ATS).
In 1992 he made a spectaculair comeback after 10 years, when he joined, Leyton-March, as a racing driver. In current days this is almost not to happen again.
He has been team manager for the A1GP Team Netherlands and he is one of the driving forces behind Racing for Holland.
In 2018 he joined the Racing Team Nederland LMP2 entry in the Le Mans Series and drove also his 24th 24 hours of Le Mans! For the remaining of the season he is replaced by Nyck de Vries.
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