What car company owns what????

[GarrettM]

lotus used to have rover engines in them.

I was also led to believe that any toyota donk with 'G' in its name eg 4AGE had yamaha designed heads.

Yup. Aren't Rover V8s based off old Buick plans?

And is there a link between BMW, I heard that M50 autos are GM products? 460LE or what ever?