After bowling out Delhi for 80, which is this season's lowest score, Hyderabad chased down the target with 37 balls to spare to move into the top four in the standings.
The defeat has also virtually ruled out Delhi's chances of advancing to the next stage.
Dale Steyn, Thisara Perera and Darren Sammy picked up two wickets each while there were one apiece for Ishant Sharma, Karan Sharma and Amit Mishra.
Dhawan was his usual self from the word go, hitting the three front-line Delhi pacers for boundaries.
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Irfan Pathan, Umesh Yadav and Ashish Nehra could hardly pose tough questions as Dhawan dominated proceedings.
The highlight of Dhawan's cameo was the boundary off Nehra, who was driven through cover-point after the batsman made room for himself.
The flamboyant left-hander then stood tall and drove Yadav between cover and mid-off for another boundary.
However, the entertainment was cut short as Johan Botha had Dhawan trapped with a skidy delivery that seemed to be heading down the legside.
Parthiv Patel, after spending some time in the middle, misread a googly by Jeevan Mendis to be stumped by Kedar Jadhav for 14.
Even as the hosts ambled, skipper Kumar Sangakkara fell to Botha while going for a needless heave and could not clear long-off where Umesh Yadav completed the catch.