yes, that's Stefan (or Stephan) Roser, a german motorsport journalist (Sport Auto I think) on a RUF CTR "yellowbird" (469 bhp Porsche mono turbo, about 221mph) in 1987 on the Nuerburgring).
There are 2 different movies (Lap 1, Lap 2) to find, perhaps on youtube.
Kind regards
Wolfgang
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