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Class 378 Capitalstar

Bombardier's Electrostar built for London Overground, walk-through from end to end. The first trains had three or four cars; all 57 had five cars by January 2016. The first 24, three-car Class 378/0s, were lengthened to four cars and renumbered 378/2.

Class 378 Capitalstar, schematic side elevation, 5 cars
Class 378 Capitalstar, schematic side elevation, 5 cars, in operation: pantographs raised to a contact wire at 4.7 mcontact wire 15 ft 5 in (4.7 m)
333 ft (101.35 m) over couplers

Class 378 Capitalstar · schematic drawing GB Trains · gbtrains.uk/stock/378/ · CC BY 4.0

Schematic side elevation of a full train, drawn from the dimensions below. Drawn from the scale drawings on TfL's Class 378 data sheet: a five-car 378/2, with its pantograph on the PTOS as the sheet draws it. Only the dual-voltage 378/2s carry one; the DC-only 378/1s have none. Branding left out: London Overground's roundel and the numbers. In operation: the pantograph raised to a contact wire 15 ft 5 in (4.7 m) above the rail, Network Rail's normal height (Network Rail, A Guide to Overhead Electrification, 2015; one wire, schematic). Drawn at 10 px per metre. Download SVG Download SVG · Use this drawing

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Liveries 2

Original London Overground liveryWhite with a black window band, an orange line on the blue skirt and another under the cantrail, and a yellow cab; still on part of the fleet in 2025 (378137, 378207 and 378233), beside the revised liveryfrom 2009Shown above
London Overground revised liveryBlack from the window foot to the cantrail, a black cab dome and an orange sweep down the cab side; to be drawn once a level side-on photograph of its cab is foundfrom 2018Not drawn yet

Special liveries 2

Compare with other trains →

Type
Electric multiple unit
Builder
Bombardier Transportation (now Alstom), Derby
Built
2008–2015
In service
since 2009
Lines
Mildmay, Windrush, Lioness
Formation
5 cars (DMOSA-MOSA-PTOS-MOSB-DMOSB), walk-through
Trains in fleet
57
Top speed
75 mph (121 km/h)
Power
750 V DC third rail (20 Class 378/1); third rail or 25 kV AC overhead (37 Class 378/2) · how it works
Bogies
Bombardier Series 3 'H-frame': P3-26 power bogies (DMOS and MOS) and T3-26 trailer bogies (PTOS) · drawn with the same bogie component as Class 357 Electrostar, Class 375 Electrostar, Class 376 Electrostar, Class 377 Electrostar, Class 379 Electrostar, Class 387 Electrostar
Train length
333 ft (101.35 m)
Car height
12 ft 5 in (3.774 m)
Car width
9 ft 2 in (2.80 m)
Profile
main-line
Walk-through
Yes
Air-conditioned
Yes
Seats per train
186
Total capacity
186 seats, 84 tip-up and perch seats and 2 wheelchair spaces; standing 420 at average load (seats plus 25% crush) and 840 at full load (seats plus 70% crush), TfL's figures, not at 5 per m²
Status
In service with London Overground, run for TfL by First Rail London since 3 May 2026 (Arriva Rail London before); owned by TfL and planned to run until about 2044.

Car types

CodeCarLengthWeight (tare)Doors per side
DMOSDriving motor65 ft 7 in19.995 m45.5 t2 double
MOSMotor64 ft 6 in19.66 m41.1 t2 double
PTOSPantograph trailer64 ft 6 in19.66 m39.9 t2 double

Sources

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