Two things I don’t like about lamborghinis: they are ugly and they come with the same key fob as an Audi. If I spent 300k on a car, I don’t want a daily reminder it has the same parent as a 30,000 Audi A3.
Porsche has Audi engines in the Macan. Mercedes has 1600cc engines from PSA. Toyota used diesel engines from BMW. Chrysler made engines for Maserati. Ford engines were used for Jaguar and Landrover.