Chasing a target of 283, India A knocked off the runs in 39.4 overs. Sheldon Jackson 59 off 56 balls also did his bit adding 119 runs for the opening stand with Rahane.
Senior pro Suresh Raina did the finisher's job with a 45 off 34 balls.
However it was Pant, whose performance was awaited and he didn't disappoint the CCI crowd as he hit eight fours and two huge sixes.
It was Deepak Hooda (23) and Ishan Kishan(5) at the crease.
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Earlier, opting to bat first the England innings was nurtured in the main by half centuries from opener Alex Hales (51) and Jonny Bairstow (64) before it got into the mire against the home side's spin attack. They were finally revived by the last wicket pair of Adil Rashid and David Willey who put on 71 runs.
The left-handed Pant, who slammed pacer Jake Ball for two fours and a short-arm pulled six in three successive balls, raced to his half century in just 32 balls before impetuosity cost him his wicket.
(REOPENS DEL 44)
These first two partnerships that came at a rate above the asking rate and pushed the total very close to the 200 mark were enough to put the home team in sight of overhauling their rivals' score.
Earlier, choosing to bat first on winning the toss, England sailed along merrily and were 116 for one when they started losing wickets in bunches mainly against the home team spinners to be left struggling at 165 for six three overs past the halfway mark of their allotted quota.
Openers Jason Roy (25) and Alex Hales (51) got the visitors off to another good start of 42 and then the latter and one-down batsman Jonny Bairstow (64) took the score past the 100-mark before the slump began.
Only Ben Stokes stood solid among the middle order in making 38 and he and Chris Woakes (16) took the score close to 200 before another in another slide England lost three more wickets before the 40th over with only 211 on the board.
The last wicket partnership of 71 in just under ten overs between Adil Rashid (39) and left handed David Willey, who remained unbeaten on 38 and struck the only two sixes of the entire innings, helped England advance to a competitive score in the end.
Sangwan's wickets included that of Roy who was hit wicket when a part of his helmet fell on the stumps to disturb the bails as we went for a pull shot off a short ball.