We just found this images of the R8 Spider. Source said they are official images of the R8, but we suppose is just a simple photoshop. In any case, the car looks amazing!
The R8 spider will be powered by the same 4.2-litre V8 naturally aspirated engine found in the RS4 and R8 tin-top. The maximum output is 414 hp.
Yes, they are from Photoshop. I know the author who made the pics, Luke from Netherlands. The guys from Topspeed removed his logo in the image and placed their own logo there.