Pesa Elf

Pesa Elf (an abbreviation of Electric Low Floor) is a family of electric multiple unit trains developed by Polish rolling-stock manufacturer Pesa SA. Elf feature a low floor design, intended for railway stations with platforms below 55 cm (22 in), improving accessibility and reducing boarding times. The trains are designed for regional, commuter, and long distance services, with different variants tailored to their intended use. There are three classes of Elf trains; Elf I, Elf II, Elf.eu and the Elf III—used as a trade name for diesel multiple units of Pesa (such as the Pesa Link) targeting markets outside of Poland. Each class includes several variants configured for different operators and service patterns. For example, the Elf I 27WE units which operate on Rapid Urban Railway (Warsaw) feature a longitudinal seating layout to maximise standing capacity for commuter services. As of 2026, around 189 Pesa Elf trains operate across Europe, with an additional 88 units currently under construction. Elf.eu trains, which use a multi-voltage system, are in service outside of Poland, currently in the Czech Republic (RegioJet) and in Romania (CFR Călători).