Hi Vekke,
Nice picture!
I just wonder why in these two calculations you've changed engine efficiency so much. First is .36 and second one is 0.28 and as far as I recall you've worked on the engine as well to make it run better. So shouldn't that be the other way around?
Just curious...
Anyway I admire you rproject. Your Lupo is not only eco friendly, but just great looking car.