Some spy-shots showing the future German sports cars as they are tested on the Nurburgring race-way.

Even though there are still some doubts about the engines, the appearance of the two models might look like in these pictures.

However, it is possible that some small changes will intervene to the exterior until the launch of the two sports cars. For example, the exhaust tips of this Audi RS5 don`t seem to be typical for an RS.

If Audi TT-RS is likely to be propelled by a turbo engine of 2.5 liters which could produce between 350 and 390 HP, regarding the engine of the Audi RS5 there are still many specualtions.

Will Audi RS4 be a genuine competitor to the BMW M6 ? This remains to be seen

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