Irrespective of what it says on it, they're all made by Borg and Beck.
Just like oil - Rolls Royce packaged oil, £14.99 per litre. The same oil goes into an Asda bottle at £3.49 per litre.
Alfa 2.2 V6 is a Vauxhall egine.
Brava/o chassis and floor pan is shared with Tipo and 145/6.
Golf = A3
Saab = Vauxhall
Jaguar = Ford
The list goes on....