British Rail Class 91

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British Rail Class 91
91111 at King’s Cross station, London
Power type Electric
Builder BREL
Build date 1988–1991
Total production 31
Configuration Bo-Bo
UIC classification Bo'Bo'
Gauge 1,435 mm (4 ft 8+12 instandard gauge
Length 63 ft 8 in (19.41 m)
Locomotive weight 84 tonnes (83 long tons; 93 short tons)
Electric system(s) 25 kV AC
Current collection method Pantograph
Top speed Design: 140 mph (225 km/h)
Service: 125 mph (201 km/h)
Locomotive brakes Air
Locomotive brakeforce 45 long tons-force (450 kN)
Train brakes Air
Career British Rail
GNER
National Express East Coast
Number 91001–91031; later 91101–91122, 91124-91132

The British Rail Class 91 is a class of 140 mph, 6,300 hp electric locomotives ordered specifically for the East Coast Main Line modernisation and electrification programme of the late 1980s. Built to replace the previous Class 43 (better known as the InterCity 125), the Class 91s were given the auxiliary name of InterCity 225 to indicate their status as a new version of the 125 and their envisaged top speed of 225 km/h (140 mph). The other end of the InterCity 225 train set is formed of a Driving Van Trailer, built with a similar bodyshell to the Class 91 locomotives.