A 2001 Ford Fiesta TDDi. Maybe I'll change it next year, but only if I'll find a cheap turbodiesel, with very low fuel consumption and not too long as in most Italian towns parking is a problem. Currently I'm considering a Renault Clio dCi in the lowest consumption version available, or a Dacia Sandero (they have Renault engines) or a Renault Twingo dCi (very short, very low consumption, excellent for city traffic) or a Honda Jazz (= Honda Fit in some countries) if the next model year will offer also a turbodiesel version as it's rumoured, but if I'll leave my town, Genoa, for one with a little wider roads and more parkings, I coud consider a Honda Civic 1.6 i-DTEC (excellent fuel consumption for its performances, it beats the VW Golf 1.6 TDI on both aspects) or a Renault Mégane 1.5 dCi (same benefits as the Civic, although performances are between the Civic and the Golf. Its engine is used also by the most fuel efficient versions of the Mercedes A-Class). If someone will release a diesel-electric serial hybrid model soon enough, it could become my choice, though.