Why is my vehicle's engine making a strange noise?

I recently purchased an Audi and have noticed that the engine has been making a strange noise when I accelerate. It almost sounds like a rattling or grinding noise. Any idea what could be causing this and how it can be fixed?

It sounds like your engine may be having an issue with the timing belt. It's important to have this checked and replaced if needed, as a faulty timing belt can cause serious damage to your engine.

Another possibility could be that your engine's oil level is low. I would suggest checking the oil and topping it off if necessary. If the noise persists, it's best to bring it to a mechanic for a proper diagnosis.