Getting a 78MPG Diesel into the USA

[Davo53209]

What would it take to get either a 3-cylinder Audi A2 or VW Lupo into this country? Granted, I am aware that newer models have been discontinued, however, if you were to look on EbayUK.com, they are still fairly common to find. Along with that, what sort of obstacles would be faced?

For sometime now, I've been looking at the stats of either vehicle and the curb weight for both cars is around 2100lbs at 78MPG US gallons. That's about the same weight as my 98 Honda Civic CX. The point in mentioning, is that even if I were not able to get either car into the country, then I would be willing to consider buying the engine, transmission, gearbox, ECU, etc. while attempting a transplant into hauled out Honda VX or Crx HF. Just to be clear, the idea of an actual transplant is for now speculatory at best; but can you imagine the added MPG that would be gained if it could push 1700LBS CRX HF?