The NK-12M developed 8,948 kW (12,000 ehp), uprated in the NK-12MV to 11,033 kW (14,795 ehp) and reaching 11,185 kW (15,000 ehp) in the NK-12MA.
== Viri in sklici ==== Zunanje povezave ==*The official information page of the Gotthard Tunnel (in German and Italian, few pages also in English)*More statistics and facts (in German) (as well as info on a second expressway tunnel)