The Class 142 does somewhat resemble a bus on rails , because that is precisely what it is! The body is based on that of the Leyland National, a very common bus that could regularly been seen on Britain's roads from the 1970s until recently though wider than earlier bus-based DMUs like the Class 141 . The chassis is a development of a high speed freight vehicle designed in the late 60s. The Class 142 does not have bogies and provides a rather poor ride for passengers and excessive wheel squeal and flange wear on sharp curves.
There are 2 sub-classes but there is little difference between the 142/0 and 142/1 and the distinction is mostly due to when they were built in 2 production series. One difference is that the 142/1 has a simpler roof structure. The Class 142s were originally fitted with Leyland TL11 engines but were re-engined, they also originally had mechanical gearboxes but were later fitted with Voith hydraulic transmission.
|Number built:||192 (96 2-car sets)|
|Builder:||BREL Derby / Leyland|
|Engine:||Cummins LTA-10R diesel per car|
|Power:||450 hp (330 kW)|
|Formation:||DMS (Driving Motor Standard)+DMSL (Driving Motor Standard Lavatory)|
The Class 142 has served with British Rail and a number of post-privatisation operators but now only serves with Northern and Arriva Trains Wales . The Class 142 will fall short of accessibility requirements for passenger trains being bought in in 2020 and there are no plans to modify them. So they should be withdrawn by the end of the decade though there is no word yet as to what will replace what is a fairly large fleet...
|Northern 142 015 at Shildon|
|Arriva Trains Wales 142 075 at Cardiff Queen Street|
|Aboard a Northern 142|
|Northern 142 023 at York|
|ATW 142 074 at Cardiff Central|
|Northern 142 015 and 091 at Darlington|
 "Nick Clegg demands replacement of outdated "Pacer" trains", The Chronicle <http://www.chroniclelive.co.uk/news/north-east-news/nick-clegg-demands-replacement-outdated-8055969>
 Colin J. Marsden, Traction Recognition (2nd Edition) (Ian Allan, 2011), p. 102
 Brian Haresnape, Diesel Multiple Units: The Second Generation and DEMUs (Ian Allan, 1986), p. 64
 Colin J. Marsden, DMU and EMU Recognition Guide (Ian Allan, 2013), p. 122