"RS" series is equivalent to the ultimate performance version of ordinary Audi models. Its performance needs to be much higher than that of the "S" series. "RS" series is exclusively designed, developed and manufactured by quattro Co., Ltd., a wholly-owned subsidiary of Audi, and is not produced according to ordinary Audi models.
If you need to share RS, you are not allowed to mention quattro Co., Ltd., Audi's racing department. Since Audi RS was developed and built by quattro Co., Ltd., quattro Co., Ltd. was established in 1983, and was initially responsible for the research and development of high-performance personal tailors and accessories.
Audi quattro's main business is to build high-performance models and accessories for Audi and customize models for customers. Now the main products produced by Audi quattro include Audi S series, Audi S series and Audi RS series. Of course, the R8 with Audi's highest performance was also completed by Audi quattro.