The 77-year-old veteran said under the incumbent president there was a "comfort feeling" and that the party could rely on her "overpowering and very successful" leadership for its revival.
"I will not be able to give any idea what will happen or what will not happen. He (Rahul) could succeed. There is another point we must understand that the overpowering and very successful leadership of Mrs Sonia Gandhi is there. So there is a comfort feeling with her," Dikshit told PTI in an interview.
PTI story did not quote the former Delhi Chief Minister as having called Rahul incapable and the agency stands by its report which was based on a tape-recorded interview.
Dikshit said Rahul's leadership qualities have not been fully tested yet.
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"I am yet to meet anybody who has any critical remarks to make about the leadership of Sonia Gandhi. I can say it with absolute confidence. Whereas (in case of) Rahul, of course, there is a question mark, there is skepticism because you have not seen him perform as yet," Dikshit said.
Dikshit's comments have come at a time when Congress appears divided on whether to anoint Rahul as president replacing his mother Sonia. Senior party leaders Amarinder Singh and Dikshit's son Sandeep had come out strongly against Rahul's elevation.
Dikshit's son Sandeep had earlier this month said that Sonia was the "leader" for "99 per cent of partymen" and she was needed at the helm now more than ever. Singh had said Sonia should "retain" Congress Presidentship and a generational change cannot be done "with a knife".
"That comfort feeling has yet to develop where Rahul is concerned," Dikshit said, adding it was too early to judge his leadership credentials.
Asked whether the party should accept if Sonia decides to step down, Dikshit said it was for her to take a call.
"She is not one of those who runs away from responsibility. I do not think she is the kind who does that. And when it comes to the survival of the Congress or the ideology of the Congress she is always there," she said.