Wheels from Rover 200-Serie on Mitsubishi Space Star: compatible?

No, the centre bore is too small

Same 4x100 PCD, but the centre bore of the wheels from Rover 200-Serie (56.1 mm) is smaller than the hub of Mitsubishi Space Star (67.1 mm): they will not fit without being re-bored by a professional.

Rover 200-Serie1989–1999Mitsubishi Space Star1998–2005
PCD4x1004x114.3 / 4x100
Centre bore56.1 mm67.1 mm
ThreadEcrous - 12x1.50Ecrous - 12x1.50
Original wheels R
≈5.5Jx14 ET45
R
≈5Jx14 ET46

≈: width estimated from the original tyre size.

Before fitting the wheels

An identical hub is not enough: offset, width and diameter change the position of the wheel, and larger calipers can touch a smaller wheel. Original wheels often use bolts or nuts with a specific seat: keep the fixings intended for the wheel, with the thread of Mitsubishi Space Star (Ecrous - 12x1.50), tightened to the torque shown on its vehicle page. Finally, check that the size is among the approved fitments for your vehicle. This comparison is for guidance only: have the fitting approved by a professional.

And the other way round: wheels from Mitsubishi Space Star on Rover 200-Serie?