4-8-2

First known tank engine version
First known tank engine version
First use	1888
Country	Colony of Natal
Locomotive	NGR Class D, Dübs A
Railway	Natal Government Railways
Designer	William Milne
Builder	Dübs & Company

Equivalent classifications
Equivalent classifications
UIC class	2′D1
French class	241
Turkish class	47
Swiss class	4/7
Russian class	2-4-1

4-8-2 (Mountain)
	Front of locomotive at left
	NGR Hendrie D, an early example of a Mountain locomotive
UIC class
Equivalent classifications
UIC class	2′D1
French class	241
Turkish class	47
Swiss class	4/7
Russian class	2-4-1
First use
First known tank engine version
First use	1888
Country	Colony of Natal
Locomotive	NGR Class D, Dübs A
Railway	Natal Government Railways
Designer	William Milne
Builder	Dübs & Company
First use
First known tender engine version
First use	1906
Country	Colony of Natal
Locomotive	NGR Altered Class B
Railway	Natal Government Railways
Designer	David Hendrie
Builder	Natal Government Railways
Evolved from	4-8-0 modified
Evolved to	4-8-4
Benefits	Improved stability at speed
First use
First known "True type" version
First use	1908
Country	New Zealand
Locomotive	NZR X class
Railway	New Zealand Railways Department
Designer	A. L. Beattie
Builder	Addington Workshops
Evolved from	4-6-2
Benefits	Heavy freight haulage on mountainous sections of railway

Under the Whyte notation for the classification of steam locomotives, 4-8-2 represents the wheel arrangement of four leading wheels, eight powered and coupled driving wheels and two trailing wheels. This type of steam locomotive is commonly known as the Mountain type, though the New York Central Railroad used the name Mohawk for their 4-8-2s.