Wild and wacky rides at Geneva Motor Show

The standard McLaren MP4-12C is quick even by supercar standards. It's equipped with a 3.8-liter 608-horsepower twin-turbo V8 engine. After you drop the accelerator, it can propel the vehicle to 62 mph in a scant 3.3 seconds. Consequently, you wouldn't think it needed more power.

Sports-car tuner Mansory, however, disagrees. The outrageous modifier has endowed the MP4-12C with some seriously flared wheel arches — all carbon fiber of course — while turning the wick up to 670 horsepower. While zero-to-62-mph numbers weren't available, the car does offer lucky owners a top speed of 219 mph. Well, maybe not lucky if wide-arched chrome orange supercars aren't your thing.

View Pictures:  McLaren MP4-12C

Rinspeed has a reputation for performing weird and wonderful modifications to what are otherwise some pretty run-of-the-mill cars. The Dock+Go concept is, well, one and a half smart fortwos. Rinspeed's theory on urban mobility is that "everybody has two axles, so why not offer something with three of them instead?" To this end, the hybrid city car sports a "backpack on wheels." Why nobody has thought of this before is mindboggling.

The Dock+Go comes with a 34-horsepower electric motor, charged by solar panels in the roof, as standard. The car weighs just under 2,000 pounds and has an all-electric range of 75 miles with zero tailpipe emissions. More power and range come courtesy of an optional Energy Pack, which features a 1.0-liter 71-horsepower engine.

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Vans are used for carrying stuff. That's their job. But for the customer who needs to lug serious loads and fancies something more than the run-of-the mill 2.0-liter turbodiesel engine, MTM will build you a bonkers van.

Under the hood is the same 2.5-liter 5-cylinder turbo engine found in the Audi TT RS, except this one's been tweaked to produce 472 horsepower and 461 lb-ft of torque. 4Motion 4-wheel drive makes the most of all that power, but MTM isn't saying how quickly it will crack the zero-to-62mph sprint. Top speed is a reported 175 mph, though — definitely cool for a van.

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If you like the performance of Porsche's 395-horsepower V8 Panamera but find it lacking in the legroom department, we've found the car for you. Ruf, a serial tuner of Porsche products, has created the Panamera XL, stretching the wheelbase by almost 14 inches, creating oceans more space in the rear in the process.

It looks a bit odd from the outside, though. An infill panel between the front and rear doors has taken up the extra length, meaning the Panamera loses pretty much any scrap of elegance it ever possessed. But it's properly luxurious inside, with a bureau for your tablet PC and plenty of room to swing a cat. It's grossly over the top, but in a wholly illogical way. We quite like it.

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Founded in 1912, Bertone is celebrating its centenary here in Geneva with this wedgie Nuccio concept, an homage to what Bertone is calling the "never-to-be-forgotten master of Italian styling in the world," Guisseppe "Nuccio" Bertone. It's an extreme Italian sports car with a midengine configuration, so in theory it should be pretty cool.

Despite its sound basic ingredients though, the Nuccio's looks let it down. Take the full-width brake-light bar, for instance. First, it's on the wrong end of the car. But even more disturbing, it give the vehicle too much of 1980s Knight Rider look. Then there's the odd gray-brown color and blazing orange accents. Ouch!

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