Hyundai Genesis R-Spec Sedan is the most powerful Hyundai ever

Buyers of the 2012 Hyundai Genesis will be screaming "Five-oh-Oh-OH!" when they check the box marked "R-Spec" on their ordering guide. Like the R-Spec'ed Genesis Coupe the Genesis Sedan R-Spec's on a performance mission, but this time it's carrying a 429-hp Tau 5.0-liter V8.

Hyundai Genesis R-Spec Sedan is the most powerful Hyundai ever

With a bored-out version of the company's 4.6-liter V8, the R-Spec's set to compete with its larger-engined rivals like the Mercedes-Benz E550 and Infiniti M56. The direct-injection 5.0-liter Tau V8 puts out 429 hp and 376 lb-ft of torque, up from the 375 hp on the formerly most-powerful V8 Genesis. The car also benefits from a "sport-tuned" suspension, 19-inch machine-finished wheels, and the option for Michelin PS2 tires.

Hyundai Genesis R-Spec Sedan is the most powerful Hyundai ever

If you're not one of the small percentage of buyers interested in extra power, the 4.6-liter V8 gets a boost from 375 hp to 385 horsepower, and the workhorse Lambda 3.8-liter V6 is bumped to a more respectable 333 hp and a corresponding increase in fuel economy to 29 mpg highway.

All of these models will benefit in terms of performance and fuel economy from the company's new eight-speed shiftronic automatic transmission. Now if only there's somewhere else we could put that 5.0-liter V8...