The Volkswagen Lupo is VW's smallest model. Two sizes smaller than the Golf, it has a 1-liter engine with only three cylinders; it's the most economical Volkswagen you can buy. Oh, that's right - if you're from North America, you can't buy it!
VW doesn't sell the Lupo here, mainly for safety reasons (conforming to U.S. Safety standards would make the Lupo too expensive and underpowered for its size). That sucks!