BMW and Fiat confirmed earlier this month that both companies were investigating the possibility of co-operation in the areas of components and architectures for their respective Mini and Alfa Romeo vehicles, as well as the sharing of dealerships and service centers in North America. BMW is expected to use one of Fiat’s new small car platforms for its third-generation Mini family, while Fiat is expected to benefit by utilizing Mini’s established North American dealer network for its U.S. re-launch planned for next year.

According to supplier sources, Fiat’s new C-Evo platform could eventually be used for a larger Mini model that would debut around 2015. The new platform will first be used in the replacement for the Alfa Romeo 147, and can be matched with both FWD and AWD powertrains.

Speaking with Automotive News, the supplier sources said BMW and Fiat were investigating using Fiat components, including its future B-platform, for the Mini Mark III, which is due in 2012 or 2013. The same B-platform will also be used for the successors to the Fiat Grande Punto and Alfa Romeo Mi.To.

In addition to platform sharing, both companies also plan to develop a new compact family of petrol and diesel engines ranging from about 1.2 to 1.6L in displacement.