The new 2008 Cadillac CTS will prove once and for all whether GM's luxury division can truly deliver on the promise of its radical "Art & Science" styling revolution and run wheel to wheel with the likes of Audi, BMW, Lexus, and Mercedes-Benz. Base engine is the 3.6-liter 'high feature'" V-6, which boasts double overhead camshafts with variable valve timing. The big news under the hood, though, is a new 300-horsepower direct-injection version of the 3.6. A first for an American-built gasoline engine, it uses an ultra-high-pressure fuel system to pump finely atomized gas directly into the combustion chambers, like a diesel. Both engines will drive through a choice of six-speed transmissions, an Aisin manual and the new Hydra-Matic 6L50 auto originally introduced on the STS-v. A limited-slip differential is available for performance drivers and all-wheel drive will be available as an option. Base wheels are 17-inch, seven spoke alloys, but 18-inch nine spoke units are also available and will be mandatory with the optional performance suspension package's larger high-performance brake calipers.