It is the biggest order ever placed for station escalators as both transport companies aim for big savings from economies of scale.
The contract was originally estimated to come with a price tag of around £190m, but Otis is understood to have cut a more competitive deal. An official confirmation of the award is expected shortly.
About 60 escalators will be required for the Crossrail stations in central London with a further 45 escalators needed for London Underground’s major escalator replacement programme.
The contract is also open to the whole TfL group and could be extended further to meet the future needs of Docklands Light Railway, London Overground as well as Tube maintenance firm Tube Lines.
Installation of new escalators for the Tube network is due to begin in late 2013 with work underway from 2015 at the Crossrail stations.