When was the Jaguar V12 engine in production?

Here's a breakdown:

* First V12: The first Jaguar V12 was introduced in 1971 in the Series III E-Type.

* Production continued: It was then used in various models, including the XJ-S, XJ-Series, and XJS.

* Final production: The last V12 engine was produced in 1997 for the XJ81 model.