Spy photographers have caught the Audi A3 Cabriolet, design-wise it is based on the A3 concept that debuted in Geneva in 2011 and Audi's second cabriolet derivative of the A3. The low, sporty convertible will be built off the Volkswagen Group's MQB platform, which forms the basis of the A3 hatchbacks, the Volkswagen Golf and Seat Leon.In the near future, a number of further derivatives will be offered, such as the next-generation Audi TT and Q3, and the next-gen Volkswagen Tiguan. S3 AND RS3 CABRIOWith its modified layout compared to the current model, it’s clear that this new cabriolet will directly target BMW’s topless 1 Series. The soft-top silhouette of the A3 Cabrio hides a premium interior that will be nearly as spacious as the A4's.Image galleryThe A3 Cabrio will be offered with a 2.0 turbocharged four-cylinder producing roughly 164kW while the the TDI will be driven by a 2.0 turbo-diesel capable of 104kW. In addition to the standard A3 Cabrio and TDI, there will be performance models. An S3 quattro cabriolet with a 2.0 (223kW) and the RS3 quattro cabriolet with a 2.5 turbocharged straight-five should round out the line-up nicely. Expect the RS3 to produce 283kW to 298kW and likely outperform the competition.All versions will sport a six-speed manual. There will be optional dual-clutch auto - six-speeds in the A3 and the S3 and a seven-speed in the RS3.