The Audi ALT-2.0-20V is a reference to the engine model used in some versions of the Audi A4. The engine designation “ALT” stands for “Audi Leichtbau Turbo,” or “Audi Lightweight Turbo.”

The 2.0-liter engine is a four-cylinder petrol engine that is turbocharged to increase its power output. The 20V in its name refers to the number of valves in the engine, with 4 valves per cylinder for a total of 20 valves.

This engine is known for its balance of performance and fuel efficiency, making it a popular choice for many Audi A4 drivers. It has a smooth power delivery and quick response, with a power output of around 220 horsepower and a torque of around 350 Nm.

Many Audi A4 vehicles equipped with the ALT-2.0-20V engine are still on the road and are considered reliable and well-performing vehicles.