FOR a change, Audi’s unrelenting new-model offensive moves downmarket as never before (in Australia, anyway), targeting the hyper-successful Mini with the $29,900 A1 hatch. But, while it shares the same underpinnings as the current Polo, the A1 is defiantly different, sharing no visual or driving cues. Should BMW, Alfa, Citroen and others be worried? Should you cancel your Polo order? Or has Audi gone too far charging $30K-plus for a model that its sister company sells for nearly half the price? The answer is no.