8j means 8 inch wide.
et 35 means theres a positive offset of 35mm from the centre line. Its basically where the hub face of the wheel is in relation to the centre of the wheel and effects how far in or out of the arch the wheel site. (no offset or negative sticks it out the arch, high sits it in the arch). I think (not being a clio man) that only the 172 cup has an et of 35, the others are higher.
pcd 4 x 100 means there are 4 holes for the bolts and diagonally they are 100mm apart
id say they would fit with some 215's. You might get issues on full lock if its lowered as they are 8" wide which is quite big.