The British Rail Class 172 is a British diesel multiple unit (DMU) passenger train from the Turbostar family, built by Bombardier Transportation's Derby Litchurch Lane Works for use on inner-suburban passenger services. The class is currently operated by West Midlands Railway.
West Midlands Railway Class 172/3s at Birmingham Moor Street
West Midlands Railway Class 172 saloon
172006 at Leamington Spa in 2020. This was originally with London Overground.
London Overground Class 172/0 No. 172005 at Walthamstow Queen's Road
A diesel multiple unit or DMU is a multiple-unit train powered by on-board diesel engines. A DMU requires no separate locomotive, as the engines are incorporated into one or more of the carriages. Diesel-powered single-unit railcars are also generally classed as DMUs. Diesel-powered units may be further classified by their transmission type: diesel–mechanical DMMU, diesel–hydraulic DHMU, or diesel–electric DEMU.
A JNR Class KiHa40 in use for Erimo Express service, Hokkaido, Japan
An IE 29000 Class diesel multiple unit on a western commuter service at Dublin Connolly Rail station, Ireland
A British Rail Class 185 diesel hydraulic multiple unit operated by TransPennine Express at Manchester Piccadilly station, United Kingdom
One of the underfloor diesel engines with hydraulic transmission under a car of JR Shikoku 2700 series DMU
