2009 Cadillac CTS-V Officially Rated at 556Hp, 0 to 60MPH in 3.9 sec!

GM has made it a habit lately of announcing moderate preliminary figures when it comes to its high-end sports cars. Just like the Corvette ZR1 was SAE-certified at 638 Hp instead of the preliminary 620Hp announced at its debut in Detroit, the 2009 Cadillac CTS-V’s supercharged 6.2-liter V8 LSA engine officially delivers 556 Hp at 6100 rpm and 551 lb.-ft. (747 Nm) of torque at 3800 rpm (