Argentina’s capital city is getting fiarly new subway trains. These are series 6000 EMUs from Madrid built in 1998, that were used in ‘large clearance’ lines. Here’s a complete article about it :
And some data about the EMUs in question (Spanish only) : http://es.wikipedia.org/wiki/Serie_6000
Curiously, for a subway these trains speed is quite high (110 km/hr, 68 Mph), but there’s an explanation for it. The line where such cars were in service was a suburban extension requirinq a change and was operated more like a commuter line