In contrast to lackluster sales of big SUVs, compact luxury crossovers have turned into quite a success story lately. As a result, manufacturers are shrinking the concept further yet, into subcompact territory. Introduced for 2015, the Q3 is some 10 inches shorter than Audi’s compact Q5 model. Audi promotes the coupe-like design of the Q3, along with its 48.2 cubic feet of cargo space. Despite a limitation or two, it’s an appealing lifestyle choice for couples and singles, in particular.