Altaria trains are composed of locomotive-hauled Talgo coaching stock equipped with gauge-changing technology which enables the carriages to run on both conventional () track and the narrower international  track which is used for the newer high-speed network in Spain.
The Altaria train set comprises locomotive-hauled Talgo coaches, featuring gauge-changing technology, which can run on both standard () tracks and the narrower international track employed for Spain's newer high-speed rail system.