(http://media.il.edmunds-media.com/koenigsegg/agera-r/ns/koenigsegg_agera-r_f34_ns_22811_196.jpg) The latest iteration of the Swedish "hypercar" develops up to 1,115 horsepower, with a "theoretical top speed" of around 273 mph. The Agera R features a larger 5.0-liter version of Koenigsegg's twin-turbocharged V8, rated at up to 1,115 horsepower when running on E85 ethanol and 885 pound-feet of torque.
Source: Koenigsegg Agera R: 2011 Geneva Auto Show (http://www.insideline.com:80/koenigsegg/koenigsegg-agera-r-2011-geneva-auto-show.html)