The quality of Jags really went up when Ford got their hands on them. Before Ford they were really not very good. What I mean is they were still nice cars but like all Brit cars, reliability was very questionable.
Not as bad as a Rover though…… I laugh at people that buy a new Rover. Nothing depreciates faster. Pay 50k for a new one and it is worth 19k before you you run out one tank of gas. In 3 years you are lucky if you can get 9k for it.