Romain Grosjean will continue to drive Haas’s car in its four-month-old specification at this weekend’s German Grand Prix while his team mate races an updated version of the car.
Haas will continue the practice is began at Silverstone, where Grosjean reverted to an Australia-spec VF-19 so the team could compare the performance of both versions in a bid to understand why it has been unable to make its tyres work properly.
“We decided on this exercise to get data and understand better what the difference between the two cars is, good or bad, then we can see where we can make improvements,” Guenther Steiner explained.

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