BREL BR 421/7

Built by BREL

Top speed

145 km/h

90 mph

Track gauge

1,435 mm

Standard gauge

Years built

1964–1972

Overview of the BREL BR 421/7

Discover the BR 421/7, a notable Electric Multiple Unit (EMU) series originally constructed by BREL between 1964 and 1972. This robust train, operating on a 1435 mm gauge, boasts a top speed of 145 km/h and served key routes, including with South West Trains in the United Kingdom.

Each car of the BR 421/7 measures 20.25 meters in length and utilizes a 750 V DC electric system powered by a third rail, ensuring efficient and reliable operation for passenger services.

Between 1985 and 1993, these trains underwent significant refurbishment, enhancing their performance and longevity. The BR 421/7 represents a piece of railway history, recognized for its dependability and versatile application in the rail network.

BREL BR 421/7 technical specifications

	Value	Imperial / US
Series	BR 421
Built by	BREL · 1964–1972
Refurbished	1985 - 1993
Top speed	145 km/h90 mph	90 mph
Electric systems	750 V DC (3rd rail)
Track gauge	1,435 mmStandard gauge4 ft 8½ in	4 ft 8½ in
Car length	20.25 m66 ft 5 in	66 ft 5 in
Width	2.82 m9 ft 3 in	9 ft 3 in
Height	3.89 m12 ft 9 in	12 ft 9 in