mostly but it was and still is an expensive engine to service. now that it is older parts are slightly cheaper but still...labor adds up quickHonestly I still feel like the Jaguar v12 gets a bad rap. my opinion is its mostly negligent owners.
fixed it for you.Put a comparable era Ferrari v12 through the average Jaguar daily driver use cycle. I bet the Jag lives a lot longer.
you bring up an interesting point. You don't see many 70's-80's ferraris as DDs but the majority of XJSs were people's daily drivers. the V12 looks really complex when you look at it but it isn't all that complex, there is just way more of everything and it's all packaged with the care and effort for which the British are known for . It's an expensive thing to pay someone to work on and an intimidating thing to work on yourself.