WITH the A5 Cabriolet, Audi is in an enviable position of offering Australian convertible buyers with a bit of disposable income to spare an attractive and practical droptop with ample performance and plenty of refinement. But, guess what? The base model tested here – the 2.0TFSI quattro – is the best of the bunch because of its sweet and spirited four-cylinder turbo powerplant, balanced handling, supple ride on the standard 17-inch wheels and relatively affordable pricing. In this particular configuration, we reckon the Ingolstadt brand has a real winner on its hands.