The development from the four-seater 530 prototype to the 901 is one of the most exciting decades in Porsche's history. Numerous previously unpublished original documents provide a detailed picture of concepts, designs, backgrounds, and decisions. A central role is played by the Type 695, whose final design was ultimately built as a one-off and became the model for the Type 754. Notes, meeting minutes, and memoranda document why the large Porsche fails and Ferry Porsche makes a drastic cut to start a completely new project: the T8, which will soon receive the type number 901.