Longer, wider and lower than the car it replaces, the new A3 (pictured below) will be available with a choice of 1.6-litre, 2.0 FSI and 3.2-litre V6 petrol engines and a 103bhp 1.9 TDI or 138bhp 2.0 TDI diesel.
Top petrol and diesel models will be available with a new 'direct shift sports gearbox' (DSG), offering the choice of electronically-controlled manual changes or a fully automatic mode.
Other new Audis seen at Geneva include a 4.0-litre V8 diesel version of the A8 which should reach the UK in October. The A8 4.0 TDI quattro develops 275bhp and 479lb-ft of torque. Audi hopes to steal a march on the BMW 7-series and Mercedes-Benz S-class, neither of which are available with V8 diesels in the UK.
Also at the show, the A4 convertible was displayed with quattro four-wheel drive for the first time, while the TT coupe and roadster were shown with 3.2-litre V6 engines. Meanwhile, the main focus of the Audi stand was the Nuvolari concept car, which Audi says is a vision for the 'GT of the future'.
Named after legendary racing driver Tazio Nuvolari, the design concept features a 5.0- litre V10 bi-turbo engine with FSI direct injection, developing 600bhp and 553lb-ft of torque.