What causes low power output in an Audi 80 engine?

I recently noticed that my Audi 80's engine is not performing as well as it used to. What could be causing this decrease in power output and how can I address it?

The most common cause of a decrease in power output in Audi 80 engines is a clogged air filter. It is important to regularly check and replace your air filter to maintain optimal engine performance.

Another potential reason for low power output in an Audi 80 engine could be a faulty fuel pump. If the fuel pump is not functioning properly, it can result in insufficient fuel delivery to the engine, leading to a decrease in power. Consider getting your fuel pump checked and replaced if necessary.