Leyland B21

The Leyland B21 was a bus chassis manufactured by Leyland between 1979 and 1985. The chassis was developed from the integral Leyland National and was designed for overseas markets,^[1][2] with its biggest market being Australia.

Leyland B21
Preserved Ipswich Buses Alexander bodied Leyland B21 in June 2013
Overview
Manufacturer	Leyland
Production	1979–1985
Assembly	Workington, England
Body and chassis
Body style	Single-deck
Floor type	Step entrance
Related	Leyland National
Powertrain
Engine	Leyland 510 GM 6V71
Transmission	Allison HT740 Voith D851
Chronology
Predecessor	Bristol RE

The B21 was assembled at Leyland's Workington factory, with some work additionally performed at the company's Bristol works.^[1][3]

Operators

In Australia, Transperth purchased 20^[4] and Darwin Bus Service 18.^{[5][better source needed]} Other purchasers included Benders Busways, Delwood Coaches, Melbourne-Brighton Bus Lines, Nowra Coaches and Surfside Buslines. All of the Australian chassis were powered by the GM 6V71.^[6][7]

In Belgium, SNCV of Brussels purchased 25.^[1][8] Israeli operator Egged sought to import 150, but difficulties over financing saw the deal fall through.^[9]

In the United Kingdom, Ipswich Buses purchased four and Ulsterbus six.^[10]