Originally Posted by wisesoul
Holy moly the M5 is powerful. Not surprised the higher displacement benz makes more outright torque, but the M5 holds its torque for longer. I wonder if the S63tü is near its limits in stock form because it seems like tuners are able to extract more from the M157 easily than the S63Tü. Still amazing what only 4.4 liters was able to do against the big boys!
Yeah, it does seem that BMW is pushing their powerplant harder from factory to be at current segment power levels. I think time will tell the M157 does have more tuning potential. Either way both cars are very quick.