Our spy photographers have caught the Audi A3 Cabrio, design-wise based on the A3 concept that made its debut at the 2012 Geneva auto show. It's the automakers second cabrio derivative of the A3.The low, sporty convertible will be built off the Volkswagen Group's MQB platform, which is the basis of the A3 hatchbacks and the VW Golf. PERFORMANCE MODELSWith its modified layout compared to the current model, it’s clear that this new cabriolet will target BMW’s topless 1 Series. The soft-top silhouette of the A3 Cabrio hides an interior that will be nearly as spacious as the A4's.Image galleryThe A3 Cabrio will be offered with a two-litre turbocharged four-cylinder producing roughly 164kW; the TDI will get a two-litre turbo-diesel making around 104kW. In addition to the standard A3 Cabrio and TDI, there will be performance models. An S3 Quattro Cabrio with a two-litre four producing 223kW and the RS3 Quattro Cabrio with a 2.5-litre turbocharged straight-five should round out the line-up nicely. Expect the RS3 to make 283kW to 298kW and likely outperform the competition. All versions will come with a six-speed manual; there will be optional dual-clutch automatics: six-speeds in the A3 and the S3, and a seven-speed in the RS3. Lots more Wheels24 spy shots.