What does the 'a' in Audi cars mean?

[DelaneyMarie]

Audi's 'a' stands for the standard sedan model series. Below is relevant information about Audi: Audi A series models: The A1 series is a small car, the A2 series is a small station wagon, the A3 series is a compact car, the A4 series is a mid-size sedan, the A5 series is a mid-size sports car, the A6 series is a mid-size sedan, the A7 series is a large sports car, and the A8 series is a large luxury sedan. Other Audi model series: The S series is the sports version based on the A series, equipped with high-performance engines and sports kits. Currently, most A series cars have S versions, such as the S3, S8, etc. The Q series is Audi's SUV models, with common models including the Q5, Q7, etc. There are also performance sports car series named TT and R.