The next and largest Pacer class was the Class 142.
This again was built by Leyland and BREL, in 1985.
The body was based on a Leyland National bus, built at Workington in Cumbria.
Many fixtures and fittings of the Leyland National could be found on the units.
The new class had a greater capacity of 120 passengers per two-car set and the same engines were used.

The first sets were used initially on Devon and Cornwall branch lines and on commuter services in the north west.
The units from Cornwall were eventually moved to Liverpool and the north east, and the Class 142s became a common sight on services across the north of England.

The 142s were upgraded in the early 1990s to include more powerful Cummins engines, which gave a total power output of 460 bhp (340 kW) per two-car set.
A number of units were then modified for use on the Merseyside PTE City Line on Merseyrail in the Liverpool region, which included dot-matrix route indicators, improved seating and Merseyrail PTE paintwork.

The class 142s moved into the control of Arriva Trains Northern and First North Western at privatisation, and subsequently passed on to Northern Rail, Arriva Rail North, Northern Trains, Arriva Trains Wales and Transport for Wales.
Eight Northern Rail units were temporarily withdrawn from service, replaced by a cascading of British Rail Class 158s.
First Great Western received 12 units on loan from Northern Rail from December 2007 to November 2011 (five units were returned to Northern in December 2008) to cover for refurbishment of its fleet and to allow most of its Class 158 fleet to be rebuilt as three-car sets.
The next and largest Pacer class was the Class 142. This again was built by Leyland and BREL, in 1985. The body was based on a Leyland National bus, built at Workington in Cumbria. Many fixtures and fittings of the Leyland National could be found on the units. The new class had a greater capacity of 120 passengers per two-car set and the same engines were used. 
The first sets were used initially on Devon and Cornwall branch lines and on commuter services in the north west. The units from Cornwall were eventually moved to Liverpool and the north east, and the Class 142s became a common sight on services across the north of England. 
The 142s were upgraded in the early 1990s to include more powerful Cummins engines, which gave a total power output of 460 bhp (340 kW) per two-car set. A number of units were then modified for use on the Merseyside PTE City Line on Merseyrail in the Liverpool region, which included dot-matrix route indicators, improved seating and Merseyrail PTE paintwork. 
The class 142s moved into the control of Arriva Trains Northern and First North Western at privatisation, and subsequently passed on to Northern Rail, Arriva Rail North, Northern Trains, Arriva Trains Wales and Transport for Wales. Eight Northern Rail units were temporarily withdrawn from service, replaced by a cascading of British Rail Class 158s. First Great Western received 12 units on loan from Northern Rail from December 2007 to November 2011 (five units were returned to Northern in December 2008) to cover for refurbishment of its fleet and to allow most of its Class 158 fleet to be rebuilt as three-car sets.
Pacer (British Rail)