Are you really trying to discredit Lamborghini because they're now owned by Audi? The passion you're referring to comes from the design. Most people couldn't care less about the sound. The other day a Ferrari 599 GTB passed by a restaurant and my friend said it was an obnoxious sounding car.
How about Pagani? Their engines are made by Mercedes/AMG. Does that mean it's any less Italian?
Maybe this will change you stance on Lamborghini
Supercars cars that use other manufacturer's engines:
-Maserati (Ferrari engines)
-Rossion Q1 (Ford engine)
-Noble M600 (volvo engine)
-Aston Martin (DB9 uses Ford-based engine)
-Ariel Atom (Honda and Suzuki engines)
-TVR Cerbera (originally a TVR engine, switched to Jaguar)
-Spyker (Audi engines)
-Koenigsegg CCX (Ford engines)