Im hacking about in an E34 520 (6pot) and like you say theyre a bit thirsty

But its worth it IMO, its cheap (To buy one), big, comfy, excellent ride, handles unbeleivably well for its age and size and because its not worth much, i dont mind throwing it at roundabouts at every given opportunity )

And they also do a Diesel (Booked at just over 40mpg iirc)