Koenigsegg is celebrating its 20th birthday this year, and for the occasion, the Swedish specialists are taking the hypercar to the next level with its new Agera One:1 at the 2014 Geneva Motor Show.

Next month's sale will include a 2016 Koenigsegg Agera RSR, estimated to go for $2.8 million to $3.4 million. It is one of only three made, all of which were sold to buyers in Japan. It is powered ...