The Rover 75 started life as a re-skin of the Rover 600, but it was quickly decided that the Rover 600 would not be re-skinned but replaced by an entirely new model – which became the Rover 75.
More at …… https://www.netcarshow.com/rover/1999-75/
Rover 75 (1999) – pictures, information & specs
MG ZT info mods and maintenance 