RR is Rolls-Royce Ltd, which is called Rolls-Royce Company. There are two main parts: one is the aircraft engine company and the other is the automobile company.
In 2003, Rolls-Royce Motor Company was incorporated into the German BMW Group, but its aircraft company was still independent, so BMW only acquired the right to use Rolls-Royce Motor Company and the car marked "Rolls-Royce", and its aircraft engine had nothing to do with BMW.
The same thing, like Geely's acquisition of Volvo, Volvo is a brand. There are not only familiar Volvo cars, but also construction machinery and mechanical equipment production. When Geely bought Volvo, it only bought Volvo's trademark, brand, technology and intellectual property rights in automobiles. Geely has no ownership of other Volvo products!
In addition, about RR technology, to be honest, it's hard to say. Aircraft engines are far away from the lives of ordinary people and are not often touched by people like cars. However, it can be said that RR, as a supporting manufacturer of the British government and air force, is equipped with engines of the British and French armies. Without excellent strength, it will definitely not work.