it led to the construction of a whole emu in 1975, the etr 401, built in two units by fiat. one was put into public service on 2 july 1976 on the rome-ancona (later extended to rimini) line, operated by italian state railways. between roma and ancona (km. 295) the train took 2 hours and 50 minutes while the ordinary trains took 3 hours and 30 minutes. the train had four cars and was mostly considered a travelling laboratory for the new technology. the second unit was adapted for service to the broad gauge renfe spanish lines.