The bolt pattern for the 45 iXL 1800 Rover and the 416 SLi is different.
The 45 iXL 1800 Rover uses a 4x114.3 bolt pattern, while the 416 SLi uses a 4x100 bolt pattern.
Therefore, the wheels from the 45 iXL 1800 Rover cannot be fitted to the 416 SLi.