Neil
I have a TDV8 and a TD6. So far I have only used the TD6 for towing and used it to tow one of my TDV8's from Oldham to Ayr. I have to say it say a very pleasant tow and one which should be greatly inproved with the bigger V8 engine. The only issue I had were relating to the tow barwhich was badly fitted.
On the drive down, solo, I was getting 21 mpg going back it went up to 24.5mpg. This I can assume was because I wasn't so heavy on the go pedal.
This is my best tow car to date.