What is the fastest road legal car in the world?

The Koenigsegg Agera RS is considered the fastest road-legal car in the world because of its outstanding performance and record-breaking speed. It boasts a twin-turbocharged V8 engine that generates a whopping 1,160 horsepower and 944 lb-ft of torque. With a top speed of 277.9 mph, the Agera RS officially surpassed the previous record held by the Bugatti Veyron Super Sport. Its aerodynamic design, lightweight construction, exceptional power-to-weight ratio, and advanced technology all contribute to its ability to reach such incredible speeds, making it the fastest road-legal car to date.