The engine company is Rolls-Royce Holdings Plc and ain't a subsidiary of anyone. It's the second largest manufacturer of aircraft engines after CFM.
BMW owns the modern car company and licenses the name and logo from the engine company.
in the context of this discussion, if all american investors pulled out of Rolls-Royce Holdings Plc because they were tasked with copying an american engine... could Rolls-Royce Holdings Plc make that engine?
This is what american isolationism means and will look like.
If things really got so bad that American investors began intentionally sabotaging the operations of foreign companies, it would probably be forcibly nationalised by the British Government.
Presumably all future contracts would stipulate terms that avoid vetos etc.
