I have had a couple of Classic Range Rovers you have to keep on top of them but its like any car you buy, you do all the usual jobs then you lok after it properly. . you never know how well the other owners have looked after it.. .
I have also owned a couple of P38's. . the one I have now is creating me a little stress as it is over fueling of the scale when I took it for MOT, plus the Land Rover computer will not read the ECU for some reason to tell me what the problem is

so it could be a box of Swan Vesta soon

All in all though for money and what you get I think the Range Rovers are a good 4 x 4 . . . V8's sound lovely, they go pretty well too when you press the go faster pedal, about 18-20 mpg, but best of all for me when Mrs Loo-knee & Loo-knee Jnr's are in it I feel they are safe if that makes sense. .