Converj vs Volt
Let's take a quick look at the Converj vs. the Chevy Volt to determine if they are indeed the same platform (as some have conjectured):
Wheelbase:
Volt - 105.7
Converj - 108.0
Length:
Volt - 177
Converj - 182
Width:
Volt - 70.8
Converj - 74
Height:
Volt - 56.3
Converj - 55
Power:
Volt - 150 kW
Converj - 120 kW
Torque:
Volt - 273 lb-ft
Converj - 273 lb-ft
So, it appears that the powertrains are mostly the same, but the platform they are built on differs significantly in the hard-points of wheelbase and width.
Given that the upcoming Alpha chassis is rumored to be a 110 inch wheelbase and coupes often are cut down a bit...it isn't impossible to think that the chassis could be based on the Alpha rather than the Volt's Delta. Countering this is the belief that the Alpha is a rear-drive platform, and the Converj concept is clearly a front-driver.
However, this could all be indicative of a concept that is truly a one-off rather than based on an upcoming product. However, that would make this the first concept in the last 3 that is not related to a production vehicle (after the CTS Coupe and the Provoq which ended up being the new SRX).