[4] Bombardier Transportation and its predecessor companies produced a variety of high-speed trainsets,[5] as part collaborations with other conglomerates, such as the Intercity-Express family of locomotives[6] (Germany), AVE Class 102,[6] RENFE class 130 (Spain), ICN (Switzerland), the Acela express[6] (USA), and parts of the TGV Duplex, Eurostar, Thalys, and ETR 500[6] trainsets (Europe various).

Additionally the company has independently produced high-speed trainsets for specific markets, such as CRH1, "Xinshisu" (China), X 2000,[6] Regina (Sweden) and Class 71 (Norway).

[1] In December 2021 Alstom announced plans to transfer the intellectual property and business activities associated with the Zefiro V300 to Hitachi Rail.

This was a condition of Alstom's acquisition of Bombardier put in place by the European Commission in order to remain compliant with EU competition law.

[19] In July 2010, the Ministry of Railways ordered 40 more 8-car 250 km/h (155 mph) CRH1E Zefiro high-speed trains from the Sifang (Qingdao) Transportation Ltd joint venture.

In September 2012, based on a modified contract with Bombardier, the MOR ordered an additional 106 8-car trains, 60 of which are to be a new variant, designated the Zefiro 250NG.

[19] A variant of the Zefiro 300 was offered by Bombardier in association with AnsaldoBreda to Trenitalia, the Italian national railway service, as part of a bid for 50 new high-speed trainsets in 2010.

[25] An evolution of the Zefiro 300 platform was also offered by a joint venture between Bombardier (later Alstom) and Hitachi Rail for the HS2 rolling stock tender for its first phase, for which it was awarded the contract for 54 trainsets.

They are equipped with a winter package including an uprated propulsion system, a single-axle drive and enhanced slip-slide regulation.

The bodyshells were manufactured by Bombardier Sifang (Qingdao) Transportation Ltd in China with final fit-out of all other components performed at the Hennigsdorf works in Germany.

[33] In 2023, it was reported that the delivery would be further delayed to 2025, due to adjustments needed to indoor climate control following intensive winter tests.