now, once you've digested the dynamics of the thinking behind it, you'll see how dangerously flawed it all was. look at the mass over the back end.
goddamn, these guys were living dangerously. if the 911's dynamics weren't already pushing the envelop of physics, this plan trumped it and blew it completely off the charts. notice written in the lower left of the drawing how large of an engine they were planning on using...5-6 liters; that's twice the size of the 911's lump. even of the engine was planned on being significantly lighter, as I'm sure it would've been, that's a serious amount of power potential placed in a very precarious position.
they did use logic, though...take a look at how far forward the differential is set necessitating the half shafts to cant forward a good 10-15°. as your eye moves towards the front, you'll see a massive radiator flanked by two batteries; the latter concept having been tried along with lead under the front bumper, with little success, on early 911s to help counteract oversteering issues with better weight distribution. notice too the use of semi-trailing arms with torsion bar rebounding furthering the detriment to this death-defying concept. the use of antiquated technologies is pretty clear, although taking into consideration this was in the very preliminary conceptual stages.
below, you'll notice how much of the boot encroaches into the cabin...this is where, despite the new engine, Porsche's engineers were still thinking in traditional terms. the idea of stuffing the motor under the rear seats seemed impossible with any V configuration; unlike the Typ 1966 where the motor was laid flat, to do so with eight cylinders would necessitate it being of boxer design or one long straight eight (read heavy) à la Duesenberg.
when we compare a more contemporary 911, the 2012 997, to the Programm H concept, you'll begin to see how much more accommodating the newer car has become and thusly more in line with the thinking nearly 45 years ago. don't be fooled into thinking that the 911 has finally become a more spacious 2+2, though, it's purely a Trompe-l'œil since the size isn't attributed to such thinking; the simple truth is that modern cars became larger for other reasons that are beyond the scope of this article.
luckily, the engineers didn't have such modern problems four decades ago, but they did come to a very efficient and contemporary solution for their new car in the form of Programm K complete with the 911's silhouette for comparison's sake. this was to be the foundation for the 928 the stylists would work from and Wolfgang Eyb would see to further refinement in what would ultimately become the 928. this drawing was completed only months after Dr. Fuhrmann was presented with the newborn idea of a front engine/rear transaxle wooden mock-up on his birthday, October 21, 1971.
programm H poster can be bought from Pelican Parts: