Fiat plans for Chrysler will scrap the US automaker's long-held plans for its brands outside North America with the exception of Jeep, people with direct knowledge of the plan have said.

Fiat CEO Sergio Marchionne is set to brief analysts and reporters on Wednesday on plans that the Italian automaker has been developing for Chrysler after taking management control as part of a restructuring arranged and funded by the Obama administration.

A Chrysler spokeswoman declined to comment to Reuters on the pending product announcements. "It will be comprehensive," she said of the briefing scheduled to include Marchionne and Chrysler chairman Bob Kidder.

The centerpiece of the five-hour presentation by Fiat and Chrysler executives will focus on plans to bring new fuel-efficient models to the US market using Fiat-developed engine technology, anonymous sources told the news agency.

That will include plans to introduce Fiat's fuel-saving MultiAir engine technology to Chrysler vehicles fulfilling the Italian automaker's promise to provide such new technology in return for its 20% stake.

The sources told Reuters other elements of the Fiat plans for Chrysler would reflect a recognition that the automaker cannot be made viable with only minor changes to its past strategy for its three brands, Chrysler, Jeep and Dodge.

That would mean Jeep remaining an international brand because of the strong name recognition it commands and being more heavily promoted in emerging markets such as Brazil, one of the sources said.

Chrysler's pickup truck line-up was recently rebadged as Ram, leaving Dodge as a niche offering and one of the elements of this week's product plans will be discussion of bringing an electric car to that brand, a source said.

Chrysler would will be integrated into Fiat's own Lancia brand with shared vehicle platforms and the attempt to build it up as a separate brand outside North America would be abandoned, the sources added.

Fiat is not expected to announce plans to spare Chrysler plants already scheduled to close, the sources also said.

Cost-saving measures would include Fiat taking over development of the rear drive platform that would have provided the underpinnings for a new Chrysler 300C, the sources said.

Fiat would thus be able to save several hundred million dollars by scrapping its own parallel development effort.

The new shared platform would be used for Lancia's Thesis model.

Fiat's Alfa Romeo brand would also take a Chrysler SUV platform, the sources said.