How does the engine of the Audi A2 achieve such high fuel efficiency?

I've heard that the Audi A2 has some incredible fuel efficiency numbers, even in the higher performance models. What technology goes into the engine to achieve this?

The Audi A2 utilizes a compact and lightweight 1.2L TDI engine, coupled with a highly advanced direct injection system and turbocharger. These components work together to maximize fuel efficiency without compromising power.

The key to the Audi A2's impressive fuel efficiency lies in its advanced engine management system. This system constantly monitors and optimizes engine performance, resulting in a smooth and efficient drive.