This is a Renfe Media Distancia class 599. It's a diesel multiple unit built by CAF of Spain. It consists of three coaches built for the Spanish broad gauge system 1668 mm gauge width. They were built by CAF in Spain 2008 and there are 50 units. Each train has a power rating of 1400 kW and a top speed of 160 km/h. There are 185 seats in one train unit.
Picture from Vigo Guixar station 16.6.2023 by Ilkka Siissalo.

This is a Renfe class 470 electric multiple unit, running for Renfe Media Distancia regional services. They were built by Construcciones y Auxiliar de Ferrocarriles MACOSA and they date back to 1993. They are used in regional express trains, for example on the route Barcelona-Figueras, but they are planned to be scrapped soon.
Picture from Barcelona Franca station 8.11.2018 by Ilkka Siissalo.

Another class 470 train of Renfe Media Distancia.
Picture from Barcelona Franca station 8.11.2011 by Ilkka Siissalo.

This is a Renfe class 448 medium distance regional express electric multiple unit. This train type is a further development of the earlier and similar class 444. These 160 km/h fast trains are from the year 1987 and they were built by the companies CAF, MACOSA, Ateinsa and MTM. 31 trains were built. The majority of them operate around Madrid, but in the Barcelona region for example the Zaragoza - Barcelona route is usually operated by these trains.
Picture from Barcelona Franca station 8.11.2018 by Ilkka Siissalo.

Another Renfe class 448 medium distance regional express train boarding passengers.
Picture from Barcelona Franca station 8.11.2018 by Ilkka Siissalo.

The class 448 electric multiple unit is a three coach train. A maximum of three three coach trains can be coupled together.
Picture from Barcelona Franca station 8.11.2018 by Ilkka Siissalo.

A class 448 electric multiple unit of Renfe Media Distancia is stopping at Barcelona Sants to load passengers on its way to Valencia.
Picture from Barcelona Sants station 8.11.2018 by Ilkka Siissalo.

Inside a class 448 electric multiple unit of Renfe Media Distancia. The large chairs are especially comfortable.
Picture from Barcelona Sants station 8.11.2018 by Ilkka Siissalo.

The diesel multiple units of Renfe Media Distancia URD S/594 are based on the well-known "Rubberface" trains used in Sweden, Denmark, Israel and Belgium, but these ones do no longer have the very ugly rubber constructions around their "face". These were built by license in Spain by CAF. One train consists of two motorised wagons called Mc. The train is 47,35 metres long and has a top speed of 160 km/h. CAF delivered the first ones of these trains in 1997.
Picture from Vigo Guixar station 16.6.2023 by Ilkka Siissalo.

The same train as above, but seen from the other side.
Picture from Vigo Guixar station 16.6.2023 by Ilkka Siissalo.