Key details about the ADR engine:
Displacement: It is a 1.8-liter, naturally aspirated, inline four-cylinder engine.
Valves: The "20 V" signifies that it has 20 valves in total, which means five valves per cylinder (three intake and two exhaust).
Power Output: This engine typically produces around 125 horsepower.
Applications: It was primarily used in various Audi and VW models, including the Audi A4 B5 and Audi A6 C5.