Due to SEAT design policy, a four-door variant of the car (without a hatchback lid, in spite of the fastback roofline) was added to the lineup in 1973.

This had 1010 cc instead of 903 cc and produced 52 PS (38 kW) rather than the 43 or 45 PS (32 or 33 kW) of the smaller unit.

[3] The SEAT 127 underwent the same styling modifications as did the Fiat 127 (new grille, taillights, bumpers) for the Serie 2, of January 1980.

At the same time, a full five-door hatchback bodywork also became available.

[1] When their licence from Fiat expired, SEAT redesigned some parts of the car and renamed it the SEAT Fura.