#2704
SR Class 4-SUB
🇬🇧 United Kingdom ·built by Eastleigh Works· from 1941· class of British suburban 4-car electric multiple unit
what is it?
The Southern Railway (SR) and the British Railways (Southern Region) (BR(S)) used the designation SUB to cover a wide variety of electric multiple-unit passenger trains that were used on inner-suburban workings in the South London area. The designation 'Sub' was first officially used in 1941 to refer to newly built 4-car units. However, during the 1940s large numbers of earlier '3-Car Suburban Sets' were increased to four cars by the addition of an 'Augmentation' trailer, and became part of the 4-SUB category.
who runs it
base stats
Bars compare against all trains: 600 km/h (maglev), 1,700 seats; power, weight and number built on a log scale up to 20 MW, 1,000 t and 20,000 built.
fun facts
- First built 85 years ago, in 1941.
- 18.9 m long: about 4 cars parked nose to tail.
- Seats 386: 8 full city buses (~50 seats each).
- Served for 42 years (1941–1983).
multiple unit: A self-propelled train: motors are spread under the passenger cars, so no separate locomotive.
spec sheet
- built
- 1941
- in service from
- 1941
- retired
- 1983
- status
- retired
- number built
- 185
- kind
- multiple unit
- traction
- electric
- origin
- 🇬🇧 United Kingdom
- builders
- Eastleigh Works
- operators
- Southern Railway, British Rail, Southern Region of British Railways
- top speed
- —
- power
- —
- formation
- DMBSO-TS-TSO-DMBSO
- length
- 18.9 m
- capacity
- 386 passengers
From the Wikipedia infobox and Wikidata. Blank means the sources don't say.
Sources: Wikidata Q267699, Wikipedia: SR Class 4-SUB (CC BY-SA 4.0).Updated 2026-10-25.