German media is reporting Audi’s R&D chief and Porsche’s engine boss will announce their retirement from VAG tomorrow.

German media is reporting Audi's R&D chief and Porsche's engine boss will announce their retirement from VAG tomorrow.

It seems heads are starting to roll within the Volkswagen Group due to the diesel engine emissions scandal as after CEO Martin Winterkorn's resignation yesterday, a report issued by Bild now states Ulrich Hackenberg - the man in charge of Audi's research and development - will also leave VAG along with Wolfgang Hatz, Porsche's engine chief.

The official announcement is expected to take place tomorrow during the company's Supervisory Board meeting where Winterkorn's replacement will be revealed. According to the latest reports coming from Germany, Winterkorn could be succeeded as CEO by Porsche unit chief Matthias Mueller or Volkswagen brand chief Herbert Diess. Another possible successor is Skoda's boss Winfried Vahland while a completely new name is unlikely to occur taking into account most of the voting power is held by only a handful of shareholders.

Gallery: Audi R&D boss and Porsche engine chief will reportedly resign tomorrow amid dieselgate