That sounds great; 1 Imperial gallon = 1.2 U.S. gallon, so you're figures translate to 19 and 20.8 respectively. There's no way to make a direct comparison since we can't control for speeds or driving style, but your experience thus far is close enough to my own to reinforce my thinking that there isn't a significant difference in the two car's mileage figures (depends on how you defince "significant" I guess...)

It seems reasonable to me to expect similar results, since both are doing essentially the same amount of work. I don't flog mine, but do enjoy a spirited burst now and again. I very rarely have an opportunity to go any distance at a cruise speed, since I rarely travel. The first year I had mine I drove it nearly 15,000 miles; last year it was just over 5,000. I wish I had more time to enjoy it!

On a related note, has there been any talk of offering the R230 with the bi-turbo 12 as in the current S600? I understand that they're claiming just under 500hp from it; should be quite a combination. You'd have performance rivalling the SL55 but the smoothness of the V12.

Travis