Why does my Audi A1's engine make a grinding noise when I accelerate?

I've noticed that whenever I hit the gas pedal, my Audi A1's engine makes a loud grinding noise. What could be causing this and how can I fix it?

This could be due to a worn out or damaged serpentine belt. It's responsible for powering various engine components and if it's worn out, it can cause strange noises. I recommend getting it checked and replaced if necessary.

There could be an issue with the fuel injectors or spark plugs. If either of them are dirty or malfunctioning, it can cause engine noise. Have a mechanic inspect them and clean or replace if needed.

It's possible that the noise is coming from a loose exhaust pipe or muffler. As you accelerate, the exhaust system vibrates and can create a grinding noise. Get underneath your car and check for any loose connections or damage.