Above mentionned Subaru Diesel has nothing much to do with the Aurelia buyers guide. However I have one (a Legacy) to keep my Aurelia company, and can recommend it as an everyday car, for long distances: I have driven mine now around 40'000 miles,averaging around 6l / 100 km, or around 47 MPG. A modern flavia diesel, with 4WD! The theoretical perfect balance of the flat four engine is really noticeable at low revs.
To get back to subject, I still have to find C&SC here in Switzerland to see what they wrote on the Aurelias (hopefully not just the usual B20 and B24, but also Berlinas!)