British Rail Class 142

British Rail Class 142 Pacer
In service1985–
ManufacturerBREL Derby and Leyland Bus
Built atDerby
Family namePacer
Constructed1985–1987 [1]
Number built96
Number in service94
Number scrapped2
Formation2 cars per trainset
Fleet numbers142001–142096
Capacity102[2] to 121 seats per trainset
Operator(s)Arriva Trains Wales
First Great Western
Northern Rail
Line(s) servedCheshire, Greater Manchester, Lancashire, Merseyside, Teeside,Tyne & Wear, Valley Lines, Yorkshire
Car body constructionSteel
Articulated sectionsFlexible diaphragm within unit only
Maximum speed75 mph (120 km/h)
Weight48.23 t (47.47 long tons; 53.16 short tons) per trainset
Prime mover(s)Cummins LTA10-R (Originally Leyland TL11)
Safety system(s)AWS, TPWS
Track gauge1435 mm (4 ft 8½ in)
Template:Ensure AAA contrast ratio
File:Roof 142022.jpg
Distinctive roof of Class 142 at Leeds. 1 July 2006

The British Rail Class 142 is a class of Pacer diesel multiple units used in the United Kingdom. 96 units were built by BREL in Derby between 1985 and 1987. They were a development of the earlier Class 141 which were introduced in 1984.


  1. "RailBritain - Class 142".
  2. Passenger Focus