1997 Le Mans 24-hour race On 14th/15th June 1997, the Joest-Porsche team repeated its success of the previous year with the Joest-TWR-Porsche. This time it was Michele Alboreto, Stefan Johansson and Tom Kristensen who won the overall victory. Joest-TWR-Porsche. Water-cooled 6-cyl. bi-turbo boxer engine, 3000 cm3, 540 HP, 886 kg