Renfe Operadora (Spanish pronunciation: [ˈreɱfe opeɾaˈðoɾa]) is the state-owned company which operates freight and passenger trains on the 1668-mm "Iberian gauge", 1435-mm "European gauge" and 1000-mm "Metre Gauge" networks of the Spanish national railway infrastructure company ADIF (Administrador de Infraestructuras Ferroviarias—Railway Infrastructure Administration).
The name "Renfe" is derived from that of the former Spanish National Railway Network, RENFE (acronym of Red Nacional de los Ferrocarriles Españoles—National Network of Spanish Railways) created on 24 January 1941 with the nationalisation of Spain's railways. As per EU Directive 91/440, RENFE was divided into Renfe-Operadora (operations) and ADIF (infrastructure) on 1 January 2005. At the same time, the existing RENFE double-arrowed logo (nicknamed the "galleta", Spanish for biscuit), first introduced in 1971 and given a facelift in 1983, with a sans-serif font, and again in 2000, with a mixed-case italic font, has been replaced by a dark purple lower-case wordmark designed by Interbrand, and also replaces some of the separate logos used by the other sectors, although the old RENFE logo remains in use in some stations in Spain and on maps to indicate an ADIF station.
The RENFE 334 is a high speed, 4 axle diesel-electric locomotive built to haul passenger trains on RENFE's Talgo service on non electrified lines.
With the well known RENFE Class 333 locomotives having served for over 30 years the Spanish rail operator faced decisions as to their future. Different options for action were available - rebuild/repair/upgrade the locomotives or replace them with new models; at the time the company was undergoing a major modernisation project - with about 6 billion Euros being invested in rolling stock as part of a 120 billion Euro transport plan.
In the event, acting pragmatically RENFE chose to do both. The 333 series were extensively rebuilt forming the 333.3 and 333.4 subclasses, and 28 new locomotives were ordered - these were the new build Class 334. A few components were used from old Class 333s, so technically the Class could be considered a rebuild, but the amount of material reused was small so a new class was created.