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New Cadillac CTS-V The fastest, most powerful Cadillac ever built. The fastest, most powerful American sedan in history, for that matter. Locked, loaded, and gunning for Europe's heavy-hitting sport sedans-BMW M5, Mercedes-Benz E63 AMG, Audi RS6. Read all that again. Now pinch yourself. No, you're not dreaming. Motown -- well, GM at least -- has its mojo back. Meet Cadillac's monster new CTS-V. Cadzilla, if you will.

Specification: 550 horsepower at 6200 rpm. 550 pound-feet of torque at 4000 rpm. They're only official "estimates," but as the engine under the new CTS-V's power-domed hood is fundamentally the same as the supercharged V-8 that's credited with 620-plus horsepower and at least 600 pound-feet in the hot new Corvette ZR1, you can safely assume the real SAE-certified figures will be close. "I'm confident we'll disappoint nobody with the numbers," says Ed Piatek, the CTS-V's program engineering manager.

2009 Cadillac CTS WiFi System