What does the 'R' stand for in Audi's R8 model?

As an Audi enthusiast, I've always been curious about what the 'R' signifies in the R8 model. Can anyone help me understand the meaning behind it?

The 'R' in Audi's R8 stands for 'Racing'. The model was originally created for the brand's racing division, but due to its popularity, it was also made available for road use.

According to Audi, the 'R' stands for 'Road'. The R8 was designed to bridge the gap between the brand's road and racing cars, bringing an ultimate driving experience to everyday roads.

Some believe that the 'R' simply stands for 'R8', as it is the model's name. It has no specific meaning, but the number 8 is considered lucky in many cultures.