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Koenigsegg: There can be only One:1

The most extreme car to appear at the Geneva auto show was the Koenigsegg One:1, which boasts 1,341 horsepower.

Koenigsegg One:1
Josh Miller/CNET
The Koenigsegg One:1 earns its name with a power-to-weight ratio of 1 horsepower to 1 kilogram. Josh Miller/CNET

GENEVA -- They call it the first megawatt car because its turbocharged 5-liter V-8 produces 1,000 kilowatts. That's 1,341 in horsepower. They named it the One:1, because it has a power-to-weight ratio of one horsepower per kilogram.

Swedish automaker Koenigsegg brought its new One:1 supercar to the Geneva auto show, demonstrating an unparalleled level of engineering. In silver and black, this road legal Agera R sibling can make it up to 273 mph.

More extraordinary, Koenigsegg notes that the One:1 can make it to 248 mph, 400 kmh, in just 20 seconds.

Carbon fiber abounds on the car, including its use in dual winglets at each fender and the intake manifold. But most remarkable are the carbon-fiber wheels, which weigh only 6,572 grams.

In a surprising nod towards renewable fuels, Koenigsegg designed the One:1 to run on E85 biofuel.

As for pricing, if you have to ask... However, Koenigsegg did list options for the car, including an upgraded audio system, a diamond encrusted key, and even a custom luggage set, although it isn't specified whether the latter comes in carbon fiber.

Check out CNET's full coverage of the Geneva auto show.