The Koenigsegg One:1 is a limited-edition, track-focused hypercar produced by Swedish car manufacturer Koenigsegg. It is the world’s first megacar, with a power-to-weight ratio of 1:1, meaning it has one horsepower for every kilogram of weight. It is powered by a 5.0-litre twin-turbocharged V8 engine producing 1,341 horsepower and 1,011 lb-ft of torque. The One:1 is capable of reaching speeds of up to 273 mph and can accelerate from 0-62 mph in 2.8 seconds. It features a lightweight carbon fibre body, active aerodynamics, and a seven-speed dual-clutch transmission. The One:1 is a rare and exclusive car, with only seven examples ever produced. It is a true engineering marvel and a testament to the capabilities of Koenigsegg.