How to troubleshoot low power output in an Audi 80?

I have noticed a significant decrease in power from my Audi 80, especially when accelerating on the highway. What could be causing this and how can I fix it?

The most common cause of low power in an Audi 80 is a clogged air filter. Make sure to check and replace it regularly for optimal performance.

Another possible issue could be a faulty fuel filter. Have it inspected and replaced if necessary to improve power output.

Check for any leaks in the exhaust system as it could affect the engine's ability to generate power. It might be a good idea to have a mechanic conduct a thorough check.