British Rail Class 170

British Rail Class 170 Turbostar
A ScotRail Class 170 at Kirkcaldy
The interior of a ScotRail refurbished Class 170
In service	30 May 1999 – present
Manufacturer	Adtranz Bombardier Transportation
Built at	Derby Litchurch Lane Works
Family name	Turbostar
Replaced	Class 142 Class 143 Class 144 Class 150 Class 153 Class 156 Class 158 Class 205 Class 207 Class 310
Constructed	1998–2005
Number built	139
Number in service	122[1] (9 converted to Class 168, 8 converted to Class 171)
Formation	2 or 3 cars per unit
Owners	Eversholt Rail Group Porterbrook
Operators	CrossCountry East Midlands Railway Northern Trains ScotRail
Depots	Tyseley TMD[2] Derby Etches Park Nottingham Eastcroft Botanic Gardens (Kingston upon Hull)[3] Neville Hill (Leeds)[4] Edinburgh Haymarket
Specifications
Car body construction	Welded aluminium, with steel body ends[5]
Car length	DM vehs.: 23.62 m (77 ft 6 in) MS vehs.: 23.61 m (77 ft 6 in)[6]
Width	2.69 m (8 ft 10 in)[6]
Height	3.77 m (12 ft 4 in)[6]
Doors	Double-leaf sliding plug (2 per side per car)
Maximum speed	100 mph (160 km/h)[7]
Prime mover(s)	2 or 3 × MTU 6R 183 TD 13H[8] (one per car)
Engine type	Inline-6 4-stroke turbo-diesel
Power output	315 kW (422 hp) per engine
Transmission	Voith T 211 rzze hydrokinetic (one per vehicle)
Acceleration	max. 0.5 m/s2 (1.6 ft/s2)[7]
Bogies	Adtranz/Bombardier Powered: P3-23 Unpowered: T3-23
Braking system(s)	Electro-pneumatic (disc)
Safety system(s)	AWS TPWS
Coupling system	BSI[9]
Multiple working	Within class, plus Classes 14x and 15x
Track gauge	1,435 mm (4 ft 8+1⁄2 in) standard gauge

The British Rail Class 170 Turbostar is a British diesel-hydraulic multiple unit passenger train designed and built by Adtranz, and later by Bombardier Transportation, at Derby Litchurch Lane Works.

The Class 170 was derived from the British Rail Class 165 and 166 DMUs, known as the Networker Turbos, of the 1990s. The first units were introduced to service in 1999, shortly after the privatisation of British Rail; they have been commonly used to operate regional as well as long-distance services, and to a lesser extent suburban services. A total of 139 units were built, but some were later converted to Class 168 and Class 171 units. These trains are currently in use with CrossCountry, East Midlands Railway, Northern Trains and ScotRail.