NEW YORK (Bloomberg) — Maurice (Hank) Greenberg, the former chief executive officer of American International Group Inc., said new CEO Edward Liddy's experience running Allstate Corp. "hardly equips" him to run AIG.

Managing Allstate, which specialises in home and auto coverage in the US "is not the same" as AIG, which operates in more than 100 countries, Greenberg said in an on-air interview on CNBC today.

"I've known Liddy for many years," Greenberg said. "In fact, he tried to peddle Allstate to me at some point."

Liddy was appointed in September by the US to run New York-based AIG after the company needed a federal rescue to stave off bankruptcy. He is the third CEO at the firm since Greenberg was forced out in 2005.

Spokesmen for neither AIG, nor Allstate responded to messages.