British Rail Class 166

The British Rail Class 166 "Network Express Turbo" diesel multiple units (also known as just "Thames Turbos" ^[1] ) were built by ABB at York Works from 1992-93. These units are the express version of the Class 165 "Network Turbo" units. They have a top speed of 90mph (suitable for mainline use), are carpeted throughout and have air-conditioning (the 165s lack the latter two features and it should be noted the 166 is similar to the Class 158 in terms of what it offers).

British Rail Class 166 "Network Express Turbo"
Great Western Railway 166208 at Didcot Parkway in 2015
Constructed	1992-1993