Take a look at the most powerful convertibles ever produced by American automakers. Second time was the charm for the SSC Tuatara supercar, which has claimed the world’s fastest production car record of 282.9 mph. The Washington state-made $1.9 million coupe completed the feat on the old Space Shuttle landing strip in Florida on January 17. (SSC) As required by many prominent record-keeping authorities, the 1,750 horsepower supercar did two runs in opposite directions to account for wind and other environmental factors at speeds of 279.7 mph and 286.1 mph. That averages out to 282.9 mph, which would beat the existing mark of 277.87 mph set in 2017 by the Koenigsegg Agera RS.