Yes, the hub is identical
Same 4x108 PCD and same 65.1 mm centre bore: wheels from Peugeot 206 Plus bolt on and centre on Peugeot 205 without rings. You still need to check the offset and tyres, detailed below.
≈: width estimated from the original tyre size.
Wheel by wheel: offset and tyres
Each original wheel from Peugeot 206 Plus is compared with the one from Peugeot 205 of the same diameter: how much closer the wheel gets to the shock absorber or how far it sticks out of the wheel arch, and whether the tyre keeps the same overall diameter.
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5.5Jx14 ET24 · 175/65R14 — Check on the car
Compared with the original ≈5Jx14 ET18 on Peugeot 205: shock absorber side +12.4 mm, wheel arch side 0 mm, tyre diameter +5.3 % : fit it with the original tyre size of Peugeot 205 (165/60R14), not that of Peugeot 206 Plus.
Comparison for guidance only (estimated width). Check in detail
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 Peugeot 205 (M12x1.25), 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 Peugeot 205 on Peugeot 206 Plus?