Alfa Romeo Spider – Click above for high-res image gallery

According to the comprehensive five-year auto transport plan which Fiat/Chrysler CEO Sergio Marchionne unveiled today, the next generation of Alfa Romeos are slated to be based on a Chrysler platform.

Among those models will be the replacement for the current Spider, as well as the new Giulia sedan and wagon. These three models – which will replace the outgoing 159, Brera and Spider – were previously thought to borrow their underpinnings from a modified version of the C-segment platform that underpins the new Giulietta, but have now been revealed to be merged into Chrysler platforms, arriving in 2012 (Giulia) and 2013 (Spider). Although Marchionne didn’t specify which Chrysler platform this will be, sources suggest it could be a modified version of the antiquated Mercedes-derived architecture that underpins the Chrysler 300 and Dodge Challenger.

In addition to the Alfa’s adoption of Chrysler architecture, Marchionne indicated that Chrysler and Lancia are set to be further integrated, with common products (including a new compact minivan and the replacement for the Ypsilon supermini) sold as Lancias in continental Europe and as Chryslers in North America and the UK. With the exception of the Challenger, Charger and Viper, Dodge and Fiat products will be similarly integrated, while Jeep is slated for an increased overseas market presence.