With its all-new A4, Audi has pulled off a rare hat trick -- producing a car that's bigger, faster, and more fuel efficient.

Powering the Brilliant Red 2009 Audi A4 2.0 T quattro Tiptronic through our battery of instrumented flogging was a heavily massaged version of Audi's 2.0L mill that's become a staple of the Volkswagen Group parts bin. The engine has undergone numerous incremental improvements, the biggest of which being the addition of Audi's valvelift system.

Audi's powertrain brains developed the valvelift system in order to allow for variable control of the exhaust valves, improving the engine's charge cycle, according to the automaker.


Full Story:


2009 Audi A4 2.0 quattro - First Test of the new Audi A4 - Motor Trend



M