273mph Koenigsegg Agera R set to take Bugatti's world speed record

Koenigsegg has updated the world record breaking Agera R hypercar for the 2013 model year, and with it boosted the top speed to a whopping (claimed) 273mph - which the company now says it will verify soon.

If it can, the Agera R will officially become the world's fastest production car - faster, even, than the 267mph Bugatti Veyron Super Sport. (See video below for details on that.)