The Audi A3 is one of the most popular compact premium cars, and still dominates despite the introduction of previously non-existent rivals like the BMW 1-Series and Volvo C30. Relatively roomy and with class-leading build quality the second-generation A3 is a desirable first step on the premium car ladder. The five-door Sportback, which debuted in 2005, introduced an new front end which was adopted by the three-door A3 in 2004. Buyers can choose from a wide range of petrol and diesel engines.