What Car? Q&A - Introduction

What does PD stand for in Volkswagens, should I chose a diesel Kia Rio, and is an Audi A2 a wise long-term investment?

Find out the answers to these and other questions in this week's Q&A.

If there are any terms you don't understand, click here to see our glossary.

Click here to submit your own question. We publish a selection of your questions – along with our answers – here every week. Please be aware that we are inundated with questions and can't promise to reply to every one.

If you're after advice on which car to choose, remember to tell us what your budget is and what your buying priorities are. Tell us if you're more interested in economy than performance, for instance, and what you'll use the car for.

Don't forget you can also turn to the What Car? Helpdesk with motoring problems or disputes you might be having. Click here to e-mail the Helpdesk.