A fundraising booklet given to potential MTG Hawke's Bay donors said the $18 million building would store the region's museum collection "with room left for further growth".
Napier City Council has ordered a review after revelations the new facility does not have enough storage space to house the existing $44 million collection, let alone any additions.
Council chief executive Wayne Jack said last week it appeared the new building, opened late last year, would be able to house only about 40 per cent of the 100,000 items in the museum's collection.
The city's mayor, Bill Dalton, and former mayor Barbara Arnott have both disputed the shortfall in space is as large as Mr Jack claimed. The council said yesterday the true extent of the problem would be determined by the review, which has been put out to tender.
In 2009, as part of its fundraising efforts for the new museum and art gallery facility, the council produced a glossy 29-page booklet setting out the case for the new facility and asking for contributions.