[Koooop]

Well, I cross shopped at wikipedia

Projected mechanical specs
Hyundai will manufacture three engines for the Genesis, marketing the car internationally with various combinations of the three:

Tau V8: The Tau V8 is Hyundai's first internally engineered 8 cylinder engine and Hyundai's first V8 equipped vehicle offered in North America. The 4.6L engine produces an estimated 375 horsepower (280 kW). Hyundai has reported 0-60 times of less than 6 seconds. [4] [5]

Lambda 3.8L V6: scheduled for availabiltiy in North American, now available in Korean models, producing 306 horsepower (228 kW), (290 horsepower (220 kW) US).

Lambda 3.3L V6: available in the Korean market, producing 266 horsepower (198 kW).
The V8 Genesis is projected to feature a standard 6-speed automatic transmission from ZF Friedrichshafen, in contrast to the Aisin transmission found in the Hyundai Veracruz.

Further V8 specs:

Configuration: Front-engine, rear-wheel drive sports sedan
Track, f/r: 1575 mm / 62.0 inches, 1580 mm / 62.2 inches
Tires: P235/50R18[6]
Estimated horsepower: 375 hp (280 kW)
Estimated torque: Over 300 ft·lbf (410 N·m)
Displacement: 4.6 liter
Block material: High pressure die casting aluminum block
Cylinder head material: Aluminum
Valvetrain: Dual Over Head Cam (DOHC)
Valve timing: Continuous variable valve timing
Variable induction system
Fuel delivery: Multi-port fuel injection
Top speed: 130 mph (restricted)
Recommended fuel: Unleaded
Stabilizer bar (front/rear): 26 mm/18 mm
Weight distribution front to rear: 53:47
Brakes: Power-assisted 4-wheel disc
Front brake diameter (mm / in): 320 / 12.6 ventilated disc
Rear brake diameter (mm / in): 314 / 12.4 solid disc
Steering type: Speed-sensing rack-and-pinion
Steering ratio: 14.86

Projected features
Anticipated features include:[1] [2] [4]

adaptive cruise control
adaptive headlamps, turn direction with the car
driver interface, similar to BMW's 'iDrive'
17 speaker Lexicon audio system [7]
USB/iPod auxiliary inputs
navigation system with backup camera
Bluetooth technology
active, variable-rate shock absorbers
push-button start
electronic stability control
fully independent suspension, five-link design front and rear
heated and cooled seats
proximity key
a rear power sunshade
eight airbags, including rear seat side-impact airbags
The Lexicon audio system offers 7.1 channels, 528 watts output, 17 speakers, two 3-way transducer systems, five 2-way transducer systems and digital signal processing that provides equalization among driver and passengers. The Rolls-Royce Phantom is the only other automobile to offer the system. [7]

They had me at 375HP.