The reason is that the L320 was the first instance when the Range Rover moniker was used for vehicles other than the conventional RR. For example, the Range Rover Sport, Range Rover Evoque, and Range Rover Velar.
Certain traditional Range Rover owners were displeased that other vehicles they deemed inferior to a Range Rover were given the same name. Specifically, the L320 model, which was introduced in 2005, was based on the Discovery 3 and had advanced traction control systems and engines. The first RRS was a more advanced automobile compared to the RR at that period, and although it was being manufactured, the L320 model continued to be built on the D3/4 platform, which was not necessarily a disadvantage.
It is only an expression of elitism 😉
