World speed record for a <a href="https://en.wikipedia.org/wiki/Steam_locomotive" id="mwjw" rel="mw:WikiLink" title="Steam locomotive">steam locomotive</a> is set in England, by the <i id="mwkA"><a href="https://en.wikipedia.org/wiki/LNER_Class_A4_4468_Mallard" id="mwkQ" rel="mw:WikiLink" title="LNER Class A4 4468 Mallard">Mallard</a></i>, which reaches a speed of <span about="#mwt11" data-mw='{"parts":[{"template":{"target":{"wt":"convert","href":"./Template:Convert"},"params":{"1":{"wt":"125.88"},"2":{"wt":"mph"},"3":{"wt":"km/h"}},"i":0}}]}' id="mwkg" typeof="mw:Transclusion">125.88 miles per hour (202.58</span><span about="#mwt11" typeof="mw:Entity"> </span><span about="#mwt11">km/h)</span>.