Chrysler’s viability plan presented to the U.S. Treasury back in February turned out to be a goldmine for information about the company’s future plans. Not only were there details about the next-generation Chrysler 300 and 2011 Jeep Grand Cherokee, but the documents also outlined details for some of Fiat’s future models that will be heading to North America once the alliance between the two was formed.

One of the models mentioned was a brand new sedan to be designed and built in the U.S. but based on Fiat’s C-Evo platform, which currently underpins cars like the Fiat Bravo and upcoming 2010 Alfa Romeo Milano. This isn’t the only American designed and built sedan Chrysler is planning, however.

Automotive News is reporting that Chrysler is currently considering launching a new RWD sedan to replace the slow-selling Chrysler Sebring and Dodge Avenger. Current options for the car include using a stretched version of Fiat’s D-Evo platform, which is currently found in the Alfa Romeo 159 sedan, as well as sourcing a platform from Opel. However, inside sources have revealed that Chrysler would most likely use the shortened ‘LX’ RWD platform developed for its 200C electric vehicle concept from January’s Detroit Auto Show if the project goes ahead. The LX underpins cars like the Chrysler 300 and Dodge Charger.

The sources explained that development could be sped up by borrowing components, such as powertrains and suspension units, from Fiat and installing them in the shortened LX platform. An affordable RWD model in the midsize sedan segment would leave Chrysler with a relatively unique offering in one of the most lucrative - and competitive - segments in the industry.

Whether the project is green-lighted remains to be seen, but one thing is for certain and that is Chrysler needs a new model for the midsize sedan segment. Both the Sebring and Avenger will be phased out late next year as production at the cars’ Sterling Heights plant in Michigan comes to an end.

You can read about the rest of Chrysler's planned lineup changes in our previous story by clicking here.