We're pumped to see the effort that went in to your (very educated) guesses. Kudos, obviously, to everyone who said Mk1 with a TDI.
Some of you already posted the links, we're glad to see the enthusiasm, but here they are anyway;
Check out the video of the car in all of it's stock, clanky, stalling glory here;
Watch Efficiency Meets Fun - A Top Gear Car Video - Top Gear US
And look at the feature, with all the details here;
We Build a 70 mpg Car - Top Gear US
We'll be back, and are really enjoying your comments. Hope to keep you EcoModders entertained =)