Stumbled upon this review from erm Full Fat Cars? on YouTube. Looks like a Dutch 3.0 V6. Anyway nice to see people still finding the XM an interesting car although probably could do with a few less uses of the word ‘quirky’ these are completely straightforward and sensible cars.

https://m.youtube.com/watch?feature=youtu.be&v=9FRUrS1WBQU