Cadillac has decided to get inspired from the Sixteen Concept design and will develope a V12-engined supersedan. The new Cadillac will be an American competitor for the Mercedes-Benz S-Class and the Lexus LS 460.

The V12 sedan will offer features such as direct injection, cylinder deactivation and a state-of-the-art automatic gearbox to ensure competitive levels of power and economy. Cadillac's desire is to double the 3.6 liter V6 engine output, and the result will be 600 hp and 540 lb-ft of torque for the 7.2-liter engine.

Experimental engines created by Holden already have undergone testing in prototype mules at the company’s Lang Lang test center outside Melbourne. The prototypes run on GM’s rear-wheel-drive Zeta architecture, as found beneath the Holden Commodore, Australia’s version of the upcoming Pontiac G8. The chassis features a lengthened engine module to accommodate the V12 engine and widened front and rear tracks.