2 generations of "BB" electric locomotives: The red is coming from Venice and is a triple voltage (25 kV AC, and 3 and 1.5 kV DC); when powered by a 25 kV AC overhead supply, engines deliver about 5760 KW (7720 hp). the purple is only 1,5Kv DC voltage for 4040 KW (5490 hp) and assume regional trips.