The Wankel engine dagger legend
Summary
NSU is regarded as a Wankel pioneer; in the late 1960s, the NSU Ro 80 was as far ahead of the competition as the Citroën DS 19 in the 1950s. But there were problems and the Wankel engine died with the Ro 80 in Germany. Or so they thought. But that's not quite true. The engine was almost resurrected in luxury-class Audi vehicles. The (long) story, shrouded in conspiracy theories and legends, reads almost like a thriller and shows why the board of management made the right decision back then when they abandoned the rotary piston engine. This report summarizes over 20 years of Wankel development and shows it in many pictures that have hardly ever been seen before.
This article contains the following chapters
- The story behind the story
- 40 years ago: KKM 871 is ready for series production
- 50 years ago: The future was called the Wankel engine
- Off to a bad start
- VW and Audi NSU retrofit
- 1969: Faith still unbroken
- From the beginning again
- Good prospects
- Wankel engine = Ro 80 = Wankel engine
- The management level
- Despite the VW crisis: Yes to the Wankel engine
- Simply getting out, practically impossible
- New challenges
- The end for the Ro 80
- Audi NSU becomes Audi
- Audi 100 and the Wankel engine
- The last chance
- Optimization despite pressure to save money
- Wankel, the loss-making business
- The off
- The Ro Audi
- An Audi 300 as a top model with Wankel
- The decision
- Wankel versus diesel
- It was no longer about prestige
- The surprise
- Conclusion
Estimated reading time: 33min
Preview (beginning of the article)
On April 26, 1979, exactly two years after production of the Ro 80 was discontinued, Audi NSU Auto Union AG announced at its annual press conference that it would not be starting series production of its KKM 871 rotary engine, which had been developed to series maturity. "After thorough examination of the technical and economic conditions, Audi NSU has decided not to start production of the KKM 871 twin-disk rotary engine, which has been developed to series maturity, at this time." The KKM 871 was the follow-up development that followed the KKM 612 (Ro 80 engine 2x 500 cc) shortly after the merger of NSU and Auto Union under the umbrella of Volkswagen. The KKM 871 had a chamber volume of 2x 750 cc and produced a whopping 170 hp.
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