The new Porsche 911 Turbo Cabriolet and Porsche 911 Turbo S Cabriolet deliver the same blend of dynamism, performance and efficiency offered by the 911 Turbo Coupe models unveiled a few months ago. The turbocharged 3.8-litre six-cylinder engine delivers 520 bhp (383 kW) in the open-top 911 Turbo and 560 bhp (412 kW) in the S model. The cars accelerate from zero to 100 km/h in 3.5 and 3.2 seconds respectively, reaching a top speed of up to 318 km/h. And all this while achieving fuel consumption of 9.9 l/100 km (equivalent to 231 g/km CO2). When compared against the respective predecessor models, the new vehicles deliver 30 bhp more power and are 0.2 seconds faster in terms of their standard acceleration. They are also up to 15% more efficient.