Car length 16.25 m (53 ft 4 in) Width 2.62 m (8 ft 7 in) Height 2.87 m (9 ft 5 in) Maximum speed 100 km/h (62 mph) Weight 20.5–22.5 tonnes (20.2–22.1 long tons; 22.6–24.8 short tons) (per car) Traction system GTO thyristor (ABB/Brush Traction)[3][2] Electric system(s) 630V DC Fourth rail there will be up to 310 services MAP:::: (ignore the west ruislip bit)