The next customisation program involving the Audi TT RS Roadster is called ‘Black and White Knight’ and was completed by Austrian tuner Oberscheider Tuning, shortly called O CT.
At the exterior the Audi TT RS Roadster by O CT looks pretty stock, except for the new set of lightweight alloys measuring 20 inches, which are wrapped in high-performance tires. The real change however is under the bonnet, where the Audi TT RS Roadster by O CT received a remapped ECU, a new air cooler kit, and revised management of the TFSI plant, which combined with the stainless steel exhaust system, enable a power increase of 80 HP and 120 Nm of torque.
This means that instead of 340 HP and 450 of torque, the Audi TT RS Roadster by O CT is now able to generate 420 HP and 570 Nm.
In order to increase stability at high speeds, the Audi TT RS Roadster by O CT has also received a coilover suspension from KW.
O CT press release :
Among the virtues of the knights was always to be nice and helpful and also to be the best in all that they did. It seems that this principle is followed by the O.CT Company as it made an Audi TT RS to pick up this shield and to move virtues of the former knights in today. What does O.CT stands for? This means the Oberscheider Tuning GmbH Lustenau in Austria, which also has an office in Widnau (Switzerland).
The standard Audi TT RS Roadster has already 340 wild horses under the hood. And 450 Nm of torque not only speak for themselves emotionally. This was the starting point of the O.CT crew. The great performance increase was achieved through so called Tuning-Kits, by changing hardware components in conjunction with the reprogramming of vehicle electronics. The conversion kit used here has tripled the power; it includes a stainless steel exhaust system including silencer and rear silencer with control valve, a charge air cooler kit and finally a revised management of the TFSI engine. The Audi TT RS produces impressionating 420 HP and 570 Nm.
Thus, the unruly existing force can be converted into motion; the TT has forged 20-inch 5 twin-spoke alloy rims. This rim is specifically designed and developed for O.CT. It is produced in compliance of the highest quality standards. The appearance is very exciting, the details are stunning. The highest expectations are met! Special emphasis was placed on lightening of the rim, which gives each vehicle elegance and sportiness. At just 13.8 kg weight in the dimension of 9×20 ET35 and 5×112 bolt pattern the highest quality of workmanship is guaranteed. Besides, the space for the “growing” engine brake force is available. In addition, KW coilover suspension V3 provides agility in (almost!) any situation.
The tournament can be started with a flourish of trumpets…

Source: Oberscheider Tuning