The AT100, which has 20m-long car bodies, is aimed at inner-suburban stopping services and metros and has wide inter-car gangways designed by Dellner. The train will be designed to operate at up to a maximum speed of between 120 and 160km/h. The AT200 will have 23m-long bodyshells and a new design of sliding plug door developed by IFE, Austria. With a maximum speed of between 160 and 200km/h, the AT200 is aimed at longer-distance regional services. The AT200 features cantilevered seats and tables for ease of cleaning and maintenance, and to allow the interior layout to be changed.

Both types of train are dual voltage with 25kV ac overhead and 750V dc third rail to make them suitable for the British market.

A mock-up of part of one vehicle for each train design was shown to prospective operators. Each coach has functioning equipment to demonstrate new technology specifically developed for this new family of electric aluminium-bodied trains. This includes a flexible passenger information system designed by Focon, Denmark, based on LCD screens which can used to show information or advertisements. Another Danish company – Aporta Digital – has designed an app which enables passengers to locate their reserved seat or find which seats are unreserved, and to secure their luggage electronically. Seats in the AT200 are fitted with QR codes, to enable passengers to log in using the app, and sensors supplied by Rechner Sensors to determine which seats are occupied by passengers. Schoenemann Design is responsible for the overall design of the AT100 and AT200.

Hitachi plans to build a prototype AT200 train and has offered the train to companies bidding for the new Scotrail franchise. Hitachi has also been shortlisted for the tender for 39 four-car emus for London Overground which is taking over the operation of services from London Liverpool Street to northeastern suburbs.