Question: what is the difference between audi a and q series?
Answer: S. If you can't stretch to an RS, you can always have the next best thing: an S. Unlike the RS cars, these are built in the same factory and on the same production line as 'regular' Audis, but they're still very quick. The S3, for example, packs a 296bhp 2.0-litre TFSI engine.