These coaches were built around 1985 by portuguese company Sorefame for the CP,  at that time  Caminhos de Ferros de Portugal  (today Comboios de Portugal) Due to the progress of the  alignment improvements of the main line from Lisbon to Porto these  coaches  can now finally run with their  projected speed of 200km/h, making Lisbon  to Porto   with about 10 intermediate stops in  around 3h.