Why is my Audi A2 unable to reach high speeds?

I have a 2004 Audi A2 and I've noticed that it struggles to reach high speeds above 50 mph. What could be causing this issue?

There could be a few potential reasons for this issue. One possibility is that there is a problem with your fuel system, such as a clogged fuel filter. Another possibility is that your spark plugs may need to be replaced. It's also worth checking your air filter to see if it needs to be cleaned or replaced.