| The Sm4 electric multiple unit (EMU) is a low-floor train used by the VR Group in Helsinki commuter rail services for medium range distance city connections such as Lahti. The Sm4 EMU consists of two powered cars. The unit is capable of regenerative braking and can thereby save up to 30 % of the electrical energy that would otherwise be consumed. The maximum speed is 160 kph / 100 mph. |