British Rail Class 43 (HST)

British high speed diesel locomotive

The British Rail Class 43 is the classification used for the InterCity 125 High Speed Train power cars, built by BREL from 1976 to 1982.

British Rail Class 43
43058 at Leicester railway station in May 2008
Type and origin
Power typeDiesel-electric
BuilderBREL Crewe Works
Build date1975–1982
Total produced197
 • WhyteBo-Bo
 • UICBo'Bo'
Wheel diameter3 ft 4 in (1.016 m)
Fuel capacity990 imp gal (4,500 L; 1,190 US gal)
Prime moverPaxman Valenta 12RP200L, Paxman 12VP185 or MTU 16V4000
AlternatorBrush Traction BA1001B
Traction motorsGEC G417AZ or Brush Traction TMH68-46, frame mounted, four off
MU workingWithin class only
Train heatingElectric Train Heat
Train brakesAir
Performance figures
Top speed148 mph (238 km/h)
Power outputEngine: 2,250 bhp (1,678 kW)
Tractive effortMaximum: 17,980 lbf (80.0 kN)
Continuous: 10,340 lbf (46.0 kN) @64.5 mph (104 km/h)[1]
Brakeforce35 long tons-force (349 kN)
Railroad(s)British Rail
East Midlands Trains
First Great Western
Grand Central
Great Western Trains
Midland Mainline
National Express East Coast
Network Rail
Virgin Trains
Cotswold Rail
Axle load classRoute availability 5


  1. "Locomotive Database - BR Class 43". 2012. Retrieved 24 July 2012.