I think Hyundai has industry-leading power figure for 2 liter turbo.
As far as I remember, VW also have something similar to 270 hp in Golf and Scirocco R (and Audi S3). BMW have their new direct injection 2.0T with 250hp in new 328 and Z4 (and 5-series also, I suppose).
The hp figure, however, is rather insignificant when compared to more important factors like efficiency and relieability.
But horsepower sell. And Hyundai know that :D
The people who actually buy this car probably won't own it for much longer than 5 year warranty period. And the engine probably won't need a major repairs during that time.
My sixth sense tells me that the best 2.0T in market probably is BMWs.