heres the real numbers by Motor-Trend2011
Mustang 5.0
3rd gear (1.69:1)
Horsepower: 365.26 hp @ 6600 rpm
Torque: 335.27 lb ft @ 4500 rpm
4th gear (1.32:1)
Horsepower: 377.99 hp @ 6500 rpm
Torque: 351.44 lb-ft @ 4400 rpm
2011 Mustang V-6
3rd gear (1.67:1)
Horsepower: 268.06 hp @ 6700 rpm
Torque: 249.95 lb-ft @ 4000 rpm
4th gear (1.24:1)
Horsepower: 267.11 hp @ 5800 rpm
Torque: 259.90 lb-ft @ 4100 rpm
2011 Mustang 5.0 (4th gear pull, 15% powertrain loss)
Claimed horsepower: 412 hp @ 6500 rpm
Claimed torque: 390 lb-ft @ 4250 rpm
Actual horsepower: 435 hp 6500 rpm
Actual torque: 404 lb-ft @ 4400 rpm
2011 Mustang V-6 (3rd gear pull, 15% powertrain loss)
Claimed horsepower: 305 hp @ 6500 rpm
Claimed torque: 280 lb-ft @ 4250 rpm
Actual horsepower: 308 hp @ 6700 rpm
Actual torque: 287 lb-ft @ 4000 rpm
2011 Mustang 5.0 (4th gear pull, 15% powertrain loss)
Claimed horsepower: 412 hp @ 6500 rpm
Claimed torque: 390 lb-ft @ 4250 rpm
Actual horsepower: 435 hp 6500 rpm
Actual torque: 404 lb-ft @ 4400 rpm
2011 Mustang V-6 (3rd gear pull, 15% powertrain loss)
Claimed horsepower: 305 hp @ 6500 rpm
Claimed torque: 280 lb-ft @ 4250 rpm
Actual horsepower: 308 hp @ 6700 rpm
Actual torque: 287 lb-ft @ 4000 rpm
Read more: http://wot.motortrend.com/6659607/auto-news/mustang-power-we-dyno-the-2011-ford-mustang-50-v-8-and-37-v-6/index.html#ixzz0jLAYSK3f