The navigation system includes voice activation and a multimedia interface that is easier to use than those from most luxury manufacturers.An iPod interface is standard, and customers can choose a 17-speaker audio system that has 7.1 Surround Sound and cranks out great music.

Room in the front and rear seats is excellent, though the Genesis could use a little more storage space for small items, and some customers will be disappointed that the rear seats don't fold down.

The standard 3.8-liter V6 is rated at 290 horsepower, and we found it delivers enough pep for most peoples' driving needs while returning good fuel economy.We also like the 4.6-liter V8 with dual overhead cams producing 385 horsepower for 2011, a 10-hp increase over the 2010 version.The V8 provides plenty of smooth, willing power and gets quite decent fuel economy, particularly for its performance level.Both engines run quietly and are mated to smooth-shifting 6-speed automatic transmissions with manual shiftgates.

Hyundai Genesis benefits from a rigid structure, rear-wheel drive, and advanced five-link front and rear suspensions, the hallmarks of a sports sedan.On twisty roads it performs well, with a generally nimble feel and a fairly flat disposition through corners.Of the two models, the lighter V6 feels more responsive through turns.The V8 model, on the other hand, benefits from electrohydraulic steering that provides sure steering assist in the tightest corners.

The Genesis rides well, ironing out most bumps with little effect on passengers.It doesn't float or wallow like other Hyundais, but the ride can get bouncy over humps and ruts at highway speeds.On the whole, the Genesis is a legitimate sports sedan, but it's not as agile as the top performers, such as the BMW 5 Series.

The 2011 Hyundai Genesis 4.6, in addition to its more powerful V8 engine, now comes standard with the Technology Package, which includes Lexicon 7.1 Discrete surround-sound audio, Ultimate Navigation featuring a larger screen and intuitive Driver Information System (DIS), smart cruise control, electronic parking brake, cooled driver seat, adaptive front lighting with HID headlamps, and parking assistance.The 2011 Genesis 3.8 V6 model continues unchanged.The Genesis sedan was launched as a 2009 model.

Genesis 3.8 ($33,000) comes standard with leather upholstery; dual-zone automatic climate control; tilt/telescoping, leather-wrapped steering wheel with audio controls; cruise control; heated front seats; eight-way power-adjustable driver's seat with lumbar adjustment; four-way power-adjustable passenger seat; heated power mirrors; power windows and door locks; remote keyless access and starting; seven-speaker AM/FM/CD/MP3 stereo; XM Satellite Radio; auxiliary audio input jack; iPod interface; Bluetooth wireless cell phone link; auto-dimming rearview mirror; compass; universal garage door opener; automatic headlights; theft-deterrent system; fog lights; and P225/55R17 tires on alloy wheels.

Options for the 3.8 include a Premium Package ($2,500) that adds a sunroof; premium leather upholstery; leather-wrapped dash and door trim; power tilt/telescoping steering wheel; memory for the driver's seat, exterior mirrors and steering wheel; Lexicon 14-speaker audio system; six-disc CD changer; automatic windshield defogger; rain-sensing wipers; and a power rear sunshade.The Premium Navigation Package ($2,000) has P235/50R18 tires on alloy wheels with chrome inserts, navigation with a 40-gigabyte hard drive, XM NavTraffic with a 90-day subscription, and rearview camera.The Technology Package ($5,500) also comes with the larger wheels and tires; and includes front and rear park assist; Ultimate Navigation with hard drive; heated/cooled driver's seat; 17-speaker Lexicon audio system with 7.1 Surround Sound, HD radio, and XM NavTraffic; rearview camera; smart cruise control; electronic parking brake,; and adaptive, auto-leveling xenon headlights.

The Genesis 4.6 ($43,000) comes loaded with all of the standard and optional equipment from the Genesis 3.8, plus electro-hydraulic power steering, chrome bodyside moldings, illuminated door sill plates, woodgrain trim on the steering wheel, and auto-dimming outside mirrors.There are no options for the 4.6.

Safety features include dual front airbags, front and rear side airbags, curtain side airbags, tire-pressure monitor, electronic active front head restraints, antilock brakes with brake assist and electronic brake-force distribution, traction control, and electronic stability control.Front and rear park assist and a rearview camera are standard on the 4.6 and come with the Technology Package and the 3.8.

Up front, the trapezoidal grille is reminiscent of a Mercedes design, but instead of rounded headlights, it's flanked by more modern eye-slit headlights.Fog lights are standard on the lower fascia, which also features a large lower air intake.Halogen headlights are standard, and the Technology Package includes auto-leveling high-intensity discharge adaptive headlights that point into turns to improve night-time vision on dark corners.

Character lines echoing the shape of the grille flow into the hood and resolve themselves at the front pillars.The rest of the car has more angular shapes like a BMW instead of the softer, rounder shapes of a Mercedes.The greenhouse is practically identical to that of the 5 Series, right down to the dogleg shape of the rear pillars.Ornamentation along the flanks is minimal, with only an upper beltline that flows from the front wheel openings to the taillights and a kickout at the bottom of the doors.Standard 17-inch wheels fill the wheelwells nicely, and the available 18-inchers look even better.

At the rear, the Genesis has the high trunk line that was so controversial for BMW five years ago but has now come into use by several manufacturers.A lower fascia flanked by dual exhausts gives a hint to the Genesis's sporty character.

The Genesis is based on a rear-wheel-drive architecture.

The driver is presented with electroluminescent gauges with white numbers on a black background and blue accents.The gauges are easy to see and read.There is a small, rectangular display between the speedometer and tach that shows trip information.

The standard setup includes a small screen at the top of the center stack that shows radio and climate information.Below that are the radio controls and at the bottom of the rounded center stack are 10 buttons devoted to climate control.We would prefer the three easy-to-use knobs that many manufacturers are using these days.The CD slot sits below the center stack and below it is a small cubby to fit CDs and the like.

The center console has an ashtray-type bin below the center stack and behind that is an aluminum plate that houses the shift knob.Two cupholders sit behind the shifter, and the center console bin is big enough to hold an assortment of small items, though a flat, rubberized tray in front of the shifter would help, too.More storage for small items can be found in fold-out pockets on each door.

The navigation option features a central multimedia controller for the radio, navigation system, iPod interface, trip computer, Bluetooth phone, and settings in the Driver Information System.It uses a large rotating knob and six buttons.Compared to BMW's iDrive, the Hyundai system is simpler to use, but it still adds a couple steps to simple tasks like programming a radio station.The iPod interface works well, too, displaying songs, artists or playlists on the dashboard screen.However, returning to a previous menu always starts you over alphabetically.It would be nice if the system returned to the last spot you visited.Nonetheless, other manufacturers would do well to study the simplicity of Hyundai's multimedia interface.

All navigation options include a 40-gigabyte hard drive to hold music files and navigation map information.Songs can be loaded from CDs or through a USB interface.

The front seats are comfortable, but sit up higher than we'd prefer and they don't have all that many adjustments for a car with this level of luxury.Front and rear head and leg room are plentiful.Only tall rear passengers will have a complaint, and probably only with head room.Four occupants should ride with ease in the Genesis.A fifth passenger, however, will have to deal with the driveshaft hump as well as a seat hump in the rear center seat.Getting in and out of the Genesis is easy.

The trunk is deep, with 16.0 cubic feet of cargo room.However, the rear seats do not fold.Hyundai opted against them for structural reasons.A rear pass-through is provided.

We drove the Genesis on twisty two-lane California roads and on a race track to experience the handling.The Genesis proved to be a capable handler, a viable match for a Mercedes-Benz E-Class we drove for comparison.By comparison, the Genesis feels a bit more numb and doesn't have as much steering feel, but it stays flatter through turns.The Genesis lacks the balance, agility, and direct steering of the BMW 5 Series.

The Genesis 3.8 V6 is lighter than the 4.6-liter V8 model, making it more nimble and responsive in the corners.

The Genesis is equipped with Amplitude Selective Dampers, which are basically two shocks in one.These shocks have one mode for small, high-frequency bumps and ripples and another mode for larger motions.Hyundai says they improve ride comfort, optimize road surface contact, and increase body and wheel control.On the road, they help the Genesis provide a smooth, quiet ride.We detected no float or wallow, though we did find that the ride got bouncy over humps and ruts at highway speeds.

Steering is direct but not overly quick.The 4.6 model has electrohydraulic steering, while the 3.8 is traditional hydraulic, and the electrohydraulic version deals with very rapid directional changes better.

The Genesis 3.8 sedan is powered by Hyundai's Lambda 3.8-liter DOHC V6, which produces 290 hp at 6200 rpm and 264 pound-feet of torque at 4500 rpm.The V6 is EPA-rated City/Highway at 18/27 mpg.

On the road, we found that the V6 had plenty of zip for most every need.It gets up to speed quickly and highway passing is a breeze.Hyundai quotes a 6.2-second 0-60 mph time.

The Genesis 4.6 model comes with a 4.6-liter DOHC V8.Like the V6, the V8 has continuously variable valve timing for both the intake and exhaust, and also comes with a Variable Intake System designed to allow the engine to breathe more efficiently at both low and high speeds.Retuned slightly for 2011, the 4.6-liter V8 produces 385 hp at 6500 rpm and 333 pound-feet of torque at 3500 rpm with premium fuel.Save some cash and choose regular fuel and those numbers drop slightly to 378 hp and 324 pound-feet of torque.

The V8 is substantially quicker than the V6.It has plenty of power from a stop, in the midrange, and at highway speeds for passing.Hyundai quotes a 5.3-second 0-60 mph time.The V8 is EPA-rated at 17/25 mpg City/Highway, which isn't much of a fuel economy penalty given the extra power.

Each engine is mated to a different 6-speed automatic transmission.Both are responsive, shifting quickly and smoothly.Both also have Hyundai's Shiftronic manual shift gate.

NewCarTestDrive.com correspondent Kirk Bell filed this report from Santa Barbara, California.