A little-known American automaker just snatched the title of World's Fastest Production Car. SSC North America says its Tuatara hypercar reached an average speed of 316 mph during two record-breaking dashes near Las Vegas. The vehicle was tested on a seven-mile stretch of a Nevada highway on Saturday. The company claims it also reached the highest speed ever achieved on a public road at 331 mph. The Tuatara has butterfly doors and produces 1,750 horsepower from a turbocharged V-8 engine. The model's aerodynamic design was inspired by fighter jets.