It's not always about out and out performance though, is it? There are plenty of faster cars than my Maserati out there, but that doesn't detract from it's appeal. Worst I got from the Maser economy wise was running around Bruntingthorpe a couple of years back. Managed to get it down to 58 miles on half a tank :-) Sensible driving average is around 20 with a slight improvement at steady european motorway speeds.
I don't ride either, mainly just my wife, her sister and one of our nieces. I just get roped in to helping out now and again.