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The last locomotive on this tour is the NZR EF class.
Built in 1986 by Brush Electric, the locomotive's design would later re-emerge in other Brush-built locomotives, such as the 'Le Shuttle' locomotives used in the Eurotunnel.
By far the most numerous class of electric locomotive, with 22 built, they also hold the title of the most powerful locomotives in New Zealand, rated at 4000 continuous hp. They are also the only electric locomotives to run on 25 KV AC power, every locomotive beforehand ran on 1500 V DC.
Introduced following the oil shocks of the '70s, the class is used to haul heavy freight trains over the demanding gradients of the North Island Main Trunk (NIMT for short)
Today, two of the locomotives were scrapped following a derailment in 1991, and three more are stored, surplus to current requirements.
