You are failing at the basic fact checks about england and the uk by citing "disinformation 4 brexiters".
As stated he is the head of European Automobile Manufacturers.
Among its members is an Indian-owned (yes, happy Diwali and all) car company located in the uk, Jaguar Land Rover. So, he is not saying that EU will be hard bit by that - but all their members, including JLR, which will be hit by as JLR is part of an integrated industry with suppliers across Europe. Since most of the European suppliers are outside the uk, and the due trade deals rules about external parts it is likely to hit JLR worse than the others (especially for electrical cars).