The Buenos Aires Underground has one of the most diverse metro fleets in the world, and has had some of the oldest models in operation on any network. The network began with a relatively standardised fleet, but throughout its over 100-year-long history, it has seen numerous purchases which have created cases where some lines operate numerous models. Recently there have been increased efforts to modernise and standardise the fleets, with large purchases from China CNR Corporation and Alstom.
La Brugeoise cars inside the Polvorín Workshop in 1913.
Interior of a Metropolitan-Cammell car on Line B.
Siemens-Schuckert Orenstein & Koppel rolling stock at Constitución station on Line C.
Fiat-Materfer cars were the first attempt at standardisation.
The Siemens-Schuckert Orenstein & Koppel is an underground car formerly used on the Buenos Aires Underground first built by Siemens-Schuckert and Orenstein & Koppel in 1934, 1937 and 1944 with a smaller number of cars built in Argentina during the 1950s. The Siemens O&K rolling stock made up the entirety of the trains used on the three lines built by the Hispanic-Argentine Company for Public Works and Finances (CHADOPyF) and has since served on every line of the Underground from 1934 to 2016, with cars refurbished by the Emepa Group and Alstom continued to function on the network till 2017.
Siemens O&K during its last day serving Line H, alongside its replacement 300 Series train.
Siemens advertisement showing the cars outside the Siemens headquarters in Berlin, Germany (c.1934).
A refurbished Siemens-Emepa-Alstom train.