British Rail Class 159

British Rail Class 159
South Western Turbo
A South Western Railway Class 159 in 2018
Standard-class interior, as refreshed by SWR
In service10 June 1993 – present
ManufacturerBritish Rail Engineering Limited
Built atDerby Litchurch Lane Works
Family nameSprinter
ReplacedLocomotive-hauled trains
Constructed
  • 159/0: 1992–1993
  • 159/1: 1989–1992
Refurbished
  • 2000–2001 (159/0 units only)
  • 2007–2008 (all units)
Number built22
(plus 8 converted from Class 158)
Number in service29
Number scrapped2 vehicles
Formation3 cars per unit: DMCL-MSL-DMSL
Fleet numbers
  • 159/0: 159001–159022
  • 159/1: 159101, 159103-159108
Capacity169 seats (23 first-class, 146 standard)
OwnerPorterbrook
OperatorSouth Western Railway
DepotSalisbury
Line servedWest of England Main Line
Specifications
Car body constructionWelded aluminium
Car length22.57 m (74 ft 1 in)
Width2.70 m (8 ft 10 in)
Height3.73 m (12 ft 3 in)
DoorsDouble-leaf plug (2 per side per car)
Maximum speed90 mph (145 km/h)
Weightapprox. 38.5 t (38 long tons; 42 short tons) per car
Axle loadRoute Availability 1
Prime movers
  • 159/0 units: 3 × Cummins NTA855-R3
  • 159/1 units: 3 × Cummins NTA855-R1
  • (one per car)
Engine typeInline-6 4-stroke turbo-diesel
Displacement14 L (855 cu in) per engine
Power output
  • 159/0: 895 kW (1,200 hp)
  • 159/1: 783 kW (1,050 hp)
  • (total)
TransmissionVoith T 211 rz (hydrokinetic)
UIC classification2′B′+B′2′+B′2′
Bogies
  • Powered: BREL P4-4
  • Unpowered: BREL T4-4
Braking systemPneumatic (disc)
Safety systems
Coupling systemBSI
Multiple workingWithin class and with Classes 14x, 15x and 170
Track gauge1,435 mm (4 ft 8+12 in) standard gauge

The British Rail Class 159 is a class of diesel multiple unit (DMU) passenger trains of the Sprinter grouping, built in 1989–1992 by British Rail Engineering Limited (BREL)'s Derby Litchurch Lane Works as Class 158. Before entering traffic, the original 22 units were modified at Rosyth Dockyard to Class 159 to operate services on the West of England Main Line, replacing various locomotive-hauled passenger trains. The units were originally branded by Network SouthEast as South Western Turbo.