What is the best way to increase horsepower in a 1995 Audi 80?

I have a 1995 Audi 80 and I'm interested in increasing its horsepower. What are some proven methods to achieve this in a cost-effective manner?

Upgrading to a performance air intake system is a popular method for increasing horsepower in your Audi 80. Not only does it increase air flow to your engine, but it also improves engine sound.

Consider investing in a turbocharger or supercharger for your Audi 80. These can significantly boost horsepower, but be sure to do your research and choose a high-quality one that won't put too much strain on your engine.