Four doors and five seats enclosed within three boxes, one up front for the oily bits, one in the middle for the people and one at the back for the luggage. You can’t get more traditional than that, but the classic saloon format has had a tough time of late. It’s not getting the boot just yet though, and it may even be in for a mini resurgence. Ask Audi, whose new-generation A3 Saloon goes on sale next week. So can a small saloon really be sexy?