Audi's former head of R&D, Ulrich Hackenburg, and Porsche's former head of engine developent, Wolfgang Hatz, are the other big two (aside from Winterkorn) in th

Audi's former head of R&D, Ulrich Hackenburg, and Porsche's former head of engine developent, Wolfgang Hatz, are the other big two (aside from Winterkorn) in the crosshairs. Not "just engineers". They were, but they were responsible for some extraordinarily impressive stuff when they were. Hatz also presided over powertrain development for what is indisputably Porsche's truly golden era for its sports cars, where they are almost never regarded as anything but some of the best on the planet.