Derby Works 25/3

Built by Crewe Works, Darlington Works, Derby Works, Beyer & Peacock

Top speed

145 km/h

90 mph

Power output

932 kW

1,250 hp

Length

15.39 m

50 ft 6 in

Track gauge

1,435 mm

Standard gauge

Axle arrangement

Bo'Bo'

Overview of the Derby Works 25/3

Explore the 25/3 diesel locomotive, an iconic model from the United Kingdom.

Designed and built in renowned workshops like Crewe Works and Darlington Works, this machine combines power and reliability for rail transport.

With a top speed of 145 km/h and an output of 932 kW, it served various organizations, including private owner groups and the British Railways Board.

Its classic design and technical specifications make it a point of interest for train enthusiasts and railway historians, offering a glimpse into British railway engineering.

This locomotive, identifiable by its Bo'Bo' UIC classification, represents an important period in British railway history.

Derby Works 25/3 technical specifications

	Value	Imperial / US
Series	BR25
Built by	Crewe Works, Darlington Works, Derby Works, Beyer & Peacock
Top speed	145 km/h90 mph	90 mph
Power output	932 kW1,250 hp	1,250 hp
Tractive effort	170 kN38,218 lbf	38,218 lbf
Track gauge	1,435 mmStandard gauge4 ft 8½ in	4 ft 8½ in
UIC axle arrangement	Bo'Bo'
Length	15.39 m50 ft 6 in	50 ft 6 in
Width	2.77 m9 ft 1 in	9 ft 1 in
Height	3.86 m12 ft 8 in	12 ft 8 in