An AMG A45 sedan would really be the perfect vehicle IMO and as an A-Class model I'm expecting it to at least be on par with the current hatchback offering or better. So in excess of 381 hp.
For me the biggest perk will be the fact it could be faster than the CLA 45 AMG which was faster than the Nissan GT-R. Being light weight and potentially packing more power can only lead to that outcome. I hear it could be pushing closer to 400 horsepower.