Why does my Audi A2 stutter when accelerating?

I recently bought an Audi A2 and noticed that it stutters when accelerating, especially uphill. What could be the cause of this and how can I fix it?

It's possible that the air filter needs to be changed. A dirty air filter can restrict the airflow to the engine, causing it to stutter. Try replacing the air filter and see if that improves the acceleration.

Another possible cause could be a faulty spark plug. When a spark plug is worn out or damaged, it can lead to misfiring of the engine, resulting in stuttering during acceleration. Have a mechanic check and replace the spark plugs if necessary.