Where is there any official mention of them putting the Sonata turbo4 motor in the GC? The last I heard was a modest gain for the current 2.0T.
"The V6 upgrade is expected to mimic the changes already announced on the 2012 Genesis sedan. The addition of direct injection and a higher compression ratio bumps output on the V6 to 333 hp and 291 lb-ft of torque. No exact power figures have been discussed regarding the 2.0T, but we expect only modest gains as Hyundai isn't likely to do anything that will adversely affect the Coupe's mileage figures. The Genesis 2.0T is capable of getting up to 30 mpg on the highway."
http://www.insideline.com/hyundai/ge...auto-show.html
Personally I highly doubt they're going to put that Sonota turbo4 motor in the GC, at least not until they dramatically increase the V6 output or replace the V6 with the V8.
Also the GC 2.0t doesn't even push 200whp, usually around 190.
Bottom numbers being stock from the stock 2.0t.