Seems some confusion
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Introduced right after the powerplay, Umran delivered that record ball in the fourth delivery of his second over, which was the 14th over of Sri Lanka's chase. The Hindi broadcast did not show anything on the speed gun, visible at the bottom of the screen when Umran bowled the fourth ball of the over but moments later, it showed the speeds of each delivery of that over, which marked the fourth ball to be 156 kph. It was fuller in length and around off as Sri Lanka batter Charith Asalanka punched it through the covers for two singles.
In the English broadcast, however, the same delivery was clocked at 145.7 kph.
This created major confusion and raised doubts over the actual speed of the delivery bowled by Umran. If it was indeed 156 kph then Umran now owns the record for the fastest delivery by an Indian in T20Is, ODIs and in the IPL as well. His fastest delivery in T20Is is of 155kmph, which he recorded six nights back against Sri Lanka. However, his fastest delivery was in the IPL, when he touched 157kph in a match against Mumbai Indians.
https://www.hindustantimes.com/cric...erent-speeds-watch-video-101673363489760.html