We need to work out a proper syntax for model names like this. Some Jaguars are written as 'Mark IX' while this one is written as 'Mark 2'. I'm not entirely sure which one is right (or if it even matters) but consistency would be appreciated.

This should be Mark II I think.

No. It's Mark 2. Big luxury ones have Roman numeral's like Mark IX or Mark X, but Mark 1 and 2 have 'normal' numbers as their model names.