This is the way Europe drives. Compact, manoeuverable, roomy enough for the average small family and... it's a diesel. More than half the new cars sold in Europe are diesels including luxury vehicles and sports sedans better known for flat-out performance. While the Jetta TDI is neither of those it shares their outstanding fuel economy and deep-down torque. The current model Jetta was launched last spring but the TDI is a late arrival. Starts at $21,605; EPA mileage 35/42 mpg city/highway.