It's been confirmed for some time that Mercedes-Benz is developing a new two-door coupe version of its C-Class to replace the current hatchback CLC model. With that in mind, it should come as no surprise that Autocar is reporting that Mercedes-Benz is also working on an AMG variant of the coupe to go up against the Audi RS5, BMW M3 and Cadillac CTS-V.

The British magazine is reporting that the coupe will use the same AMG 6.2-liter normally aspirated V8 as one of our favorite Benz sedans, the C63 AMG. However, if this car is to debut later in 2011 as projected, it would seem logical that Mercedes might switch to the new twin-turbo 5.5-liter V8 that's going into the 2011 CL63.

The turbo V8 could the output from the current 451 horsepower to somewhere closer to 500 hp. Autocar also speculates that a C63 Black Series coupe could be a followup to an upcoming SLS Black Series.

[Source: Autocar]