Ever-expanding Audi is adding the final touches on the R8 Spyder (could be named Spider though) that is expected to premiere at the Frankfurt motor show in September. A thinly disguised prototype model of Ingolstadt's drop-top supercar was captured on film during testing at the Nurburgring race track. Despite the fact that only the rear window seems to be covered, the dark finish does not allow us to view the design in all its glory. What is clearly visible though is the R8 Spyder's fabric roof.
If we're not mistaken, the prototype seen in the spy footage appears to be equipped with Audi's 5.2-liter V10 FSI that churns out 525HP at 8,000 rpm and a peak torque of 530Nm or 390.91 lb-ft. Unverified reports from both sides of the Atlantic suggest that the R8 Spyder will initially be available only with the V10 engine, though we find it hard to believe that the German firm won't offer the smaller 4.2-liter V8 engine in the near future.