My +8 (a 1996 3.9) has always indicated 95-100 degrees, going up to 115-120 when it’s hot. That was until it badly overheated recently and is now awaiting a new aluminium rad.
That is (admittedly indicated) far too hot, a Rover V8 engine should be run between 80-90 degrees. Prolonged running at temperatures above this can cause softening of the heads behind the exhaust valve seats, detonation and pinking along with a significant drop in performance.
