Volkswagen and Audi are pioneers in the commercialization of dual clutch transmissions under the DSG brand. The TT is offered with either a DSG or manual transmission. The beauty of a DSG is that it has the mechanical efficiency of a manual with lightning fast shifts that help performance and reduce the losses during shifts to provide even better mileage than a manual. It can also provide seamless automatic operation for those who prefer two pedal operation with 10-15 percent better mileage. Vicki Butler-Henderson of Fifth Gear in the UK got a chance to take lap a racetrack in two near-identical TTs where the only difference was the gearboxes. The DSG-equipped car managed to go four-tenths of a second faster and gets better mileage from the same engine. Check out the video after the jump.

[Source: Fifth Gear]

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