In September 1963, Porsche introduced the public to the Porsche 901 – the successor to the Porsche 356 – at the IAA in Frankfurt.
Series production of the 901 began in September 1964. When Porsche exhibited the vehicle at the Paris Motor Show in October of the same year, the French car manufacturer Peugeot became aware of the model designation and objected to it. The reason for this was that Peugeot had patented the type designation consisting of three-digit numbers with a zero in the middle.
Porsche renamed the 901 to the 911. This number sequence is the emergency service number in the USA and was therefore already well known in this important market for Porsche. In total, 82 units of the 901 were produced before the name was changed.