During the Supercar Owners Circle weekend in Spain, some incredible vehicles made an appearance. One of the most attention-grabbing machines was a Koenigsegg One:1 with its carbon-fiber body on full display. The crowd couldn’t resist taking photos of it.

The One:1 was a special version of the Agera, and its name referred to the weight-to-horsepower ratio. Powered by a twin-turbo 5.0-liter V8 engine, it produced an impressive 1,360 metric horsepower (1,341 horsepower), while weighing only 1,360 kilograms (2,998 pounds). This power was transferred through a seven-speed dual-clutch gearbox. Accelerating at a mind-boggling rate, the car could reach a speed of 249 miles per hour in about 20 seconds. In fact, its estimated top speed of 273 mph positioned it among the fastest cars in the world.