The Koenigsegg One:1 is a new generation hyper car currently in development by Koenigsegg. The design goal of the One:1 is to create a category class for excessively high-performance vehicles. The One:1 is based on the Koenigsegg Agera line of models with the exception of being purpose built to produce a horsepower to weight ratio of 1 to 1. The resulting ratio will propel the car from 0 to 249 miles per hour (0 to 401 km/h) in 20 seconds.