912 & 912E Differences Between Years - "Which Year is Best?"

Over the six years of manufacture, the factory was constantly updating the 912.  Owners could also create a unique 912 by specifying numerous options offered.  Following are numerous changes in the evolution of the 912/912E (click for a table of original specifications or a list of 912 books).  Features should be considered individually; an original car may not have all the features listed in a yearly group.

1976

After a seven year gap in 912 production,  the 912E began production in 1975 utilizing the "I-series"  911/912 chassis, and was internally designated at the factory as the Type 923.  Click here to learn about Dr. Berndt Bergk's Preseries 912E, the prototype!  Offered in the 911 coupe coupe body style with sunroof option available, the 912E is the last Porsche model powered by a four-cylinder air-cooled engine.   By the end of 912E production, the factory had produced just over 2000, delivered primarily to North America.

The 1971cc flat-four engine evolved from the 914/4, with a new Bosch L-Jetronic system (AFC injection system later adapted for the 911) that "took Porsche engineers two years to develop and refine".  The exhaust gas recirculating system had to be checked every 30,000 miles and a warning light indicated this. The engine performance was 90 HP at 4900/min and due to the low compression of 7.6:1, could run on regular gasoline.

For 1976 the factory began zinc coating the basic chassis unit, although due to limited availability not all cars received exactly the same treatment.  According to PCA's Upfixin' the galvanization of Porsche floorpans and other panels began well before  the 1976 model year, but early series cars are argued to have had galvanized panels only up to the roofline. The galvanization along with a switch to high-quality Theissen steel is said to have made the 1976 model year and on cars very resistant to corrosion if properly cared for.  Other changes include a 923/02 transaxle, energy-absorbing bumpers, 21 gallon fuel tank; revised steering rack; revised seats, steering wheel and mirrors, ATS "cookie-cutter" alloy wheels.

Would you prefer owning one of the earliest existing 912s, or one of the very last made?  One with a rare feature or option?  Concours rules notwithstanding, if you like an early car but also want a particular features from later years, also consider that many parts are interchangeable.  For example, an owner less concerned about originality could, for example, modify numerous 912 suspension components.   Consider keeping the old parts just in case (like those soft-window Targa parts to be removed when an owner installs a glass rear window). 

912 owners don't need the latest sports car, only his or her favorite 912(s).  Then again, consider the adage "If you really like something, buy two; some day they will stop making them."