Brabus claims the world’s fastest, most powerful sedan with new SV12 R Biturbo 800

Mercedes-Benz is no stranger to wickedly powerful and insanely fast luxury sedans. After all, its AMG models are among the fastest and most powerful on the market. Leave it to specialty Benz tuner Brabus, then, to take it the extra mile… and then some.

The freshly unveiled Brabus SV12 R Biturbo 800 claims the mantle as both the fastest and most powerful sedan on offer. To get there, the German tuner has tweaked the 5.5-liter V12 from the S600 to 6.3 liters, fitted a new crankshaft, camshafts, cylinder heads, air intake, exhaust, turbochargers, quad interoolers and bigger pistons, and of course, remapped the ECU. The result is a massive 788 horsepower (800 in metric form, hence the name) and 1,047 pound-feet of torque. The twist is so massive, however, that Brabus had to electronically limit it to 811 lb-ft. Don’t worry – performance hasn’t been hindered. 0 to 62 sprints are managed in just 3.9 seconds and its Autobahn-devouring top speed is electronically limited to just 217 miles per hour.

Bigger brakes help keep the beast under control, as well as a new limited-slip differential. A full aero kit and upgraded rolling stock are on hand, as well, completing the “we mean business” look. Check it out for yourself in the gallery below, and hit the jump for Brabus’ official release.

Report: Washington to require that ‘quiet’ cars get alert sounds

Hands down, one of the few pleasures of driving a hybrid is cruising around in all-electric mode. There’s just something that’s undeniably cool about silently whisking along, but if a new auto safety bill makes its way into law, we can kiss even that one pleasure goodbye. A coalition of automotive manufacturers and advocacy groups for the blind have joined forces to make sure that silent-running vehicles will make more noise in the future. The logic is that the blind and other pedestrians are at risk of being struck by quiet hybrids and EVs. We can’t really argue with that one.

If passed, the bill would have the National Highway Transportation Safety Administration propose regulations for an “alert sound” within a year and a half, and finalize the rules within three years. Drivers would not be able to turn off the noise. So far, there’s no word as to how loud the noise would be or what it will sound like, but the technology already exists to make that sound signature variable – concept cars like the Brabus Smart High Voltage EV shown above can simulate the sound of everything from a buzzing bee to a good ol’ American V8 with hidden speakers inside and outside of the vehicle, with the sound varying according to engine speed. If we absolutely have to be making a racket while we drive on all-electric power, we vote for sounding like George Jetson’s daily commuter, but we’re not exactly crazy about user-selectable EV ‘ringtones,’ lest one’s daily commute become an auditory assalt of Star Wars Tie Fighters and clydesdales.

Infiniti FX50 S Dressed Up in Styling Package by Brabus' CRD Division

Here’s a proposal from this year’s Frankfurt Show that somehow managed to escape our radar. Supposedly a concept study, the Infiniti FX50 S Limited Edition was created by Car Research and Development or CRD for short, a subsidiary of the Brabus Group that works directly with automakers and their national importers. Among other cars, CRD was responsible (…) for the creation of the Dodge Avenger-based Startech Starster that appeared at the 2007 Frankfurt Show.

The Infiniti FX50 S Limited Edition show car gets a set of bespoke 21-inch turbine-design light-alloy wheels in a grey finish, while the front grille, side air inlets in the front fenders and the roof bars are also painted grey.

The luxury SUV’s cabin is upholstered in high-quality leather with contrasting light brown stitching while the carbon-fiber trim in a dark brown finish and the alcantara trim on the headliner and pillars round off the interior upgrades.

And yes, we too are wondering why Brabus / CRD even bothered to call this creation a concept study…

Citroën DS4 Racing hybrid set to take on Audi S3?

In its quest to take on the lucrative premium compact segment, Citroën has been unrelenting with the release of the its higher-end DS line. The DS4 was just unveiled in Paris, and now reports indicate that the French automaker plans to take on the likes of the Audi S3 and Volkswagen Golf R with a new performance-oriented version of the high hatch.

The kicker is that, according to recurring reports, the Citroën DS4 Racing is tipped to go hybrid, following the likes of the Honda CR-Z and Lexus CT200h. A 95-horsepower electric motor would be mated to the car’s 200-horsepower turbo four, in either a Hybrid4-sytle all-wheel drive setup or as a front-driver using the system being developed with BMW. Sounds enticing, but hybrid or not, the DS4 Racing isn’t expected before 2013.

Report: Citroën to build Metropolis concept flagship

The beauty of an automaker entering a completely new market like China is the ability to completely redefine what the brand stands for to local buyers. In the case of France’s Citroën, they’re going decidedly upmarket, but instead of taking baby steps like turning its C3 econo-hatch into the DS3 premium hatch, the French automaker can start completely from scratch.

According to reports from Europe and China, parent company PSA/Peugeot-Citroën is planning on jump-starting its Asian operations by building a production version of its Metropolis concept, the first design carried out at the company’s Shanghai-based design team. Unveiled there in May, the Metropolis stands for the Double Chevron’s vision of what the marque could be to upscale Chinese buyers.

In production form, the Metropolis is anticipated to carry the DS9 nameplate, topping the DS range with an executive limousine that looks like the size of China itself. While the concept featured a compact V6 mated to an electric motor and seven-speed dual-clutch gearbox, the production version could carry any powertrain, likely nestled into a modified platform borrowed from the outgoing Citroën C6 and Peugeot 407. The DS9 looks poised to be built at the joint-venture facility announced last July with Changan Automobile Group. Whether it will ever make it outside of China, of course, remains to be seen.

Paris Preview: Citroën puts un peu d’air sur terre with Lacoste concept

French couture, as is widely known, is at the very height of fashion. French cars, well…less so. But Citroënis hard at work to fix that and capitalize on potential synergies within its own homeland. Its new DS line of premium vehicles is doing much to bridge that gap, as are concepts like the Metropolis and theGQbyCitroën. Now the French automaker has teamed up with a sportswear powerhouse to develop a new show car set to debut on its home turf in Paris next week.

The product of collaboration with tennis-wear giant Lacoste, Citroën’s latest concept takes the alligator brand’s slogan “un peu d’air sur terre” (“a little air on the ground”) to heart with an open buggy-like design ready to, according to Citroën, transports its “passengers to a lighter, fresher world.” And what does that entail, exactly? No roof, no doors and a collapsible windshield, apparently, taking cues from classic Jeeps, but in a more, how you say, avant garde form.

Powering those jumbo golf-ball wheels is a compact three-cylinder gasoline engine that Citroen figures should be plenty to propel the compact vehicle along in joie de vivre bliss. Beyond that, we’ll let the French designers’ work speak for itself, so take a stroll through the Louvre-like gallery of high-resolution images below for a closer look, or follow the jump for the full press release.

New Citroën Metropolis concept photos released ahead of Shanghai debut

Citroën rarely disappoints when it comes to concept cars. This year, for example, we’ve already gotten theSurvolt and DS High Rider. Its latest effort steps up the luxury in a big way. The Citroën Metropolis concept , set to debut in Shanghai later this month, is a beautiful and very French take on the Maybach formula (whether PSA actually greenlights a production venture into such rarefied air remains to be seen.)

Some of the Metropoplis concept’s lines are similar to those first seen on the GTbyCitroen supercar, but they’re more elegant than outrageous as presented on this opulent saloon. A 460-horsepower hybrid powertrain has our interest piqued as well, but for now we’ll have to keep ourselves content with the photo dump that just hit Citroën’s media site. All the latest images are laid out in the high-resolution gallery below, and we’ve begun counting down to this year’s Paris salon to see what Citroën has in store for us next.