* Top speed: This refers to the highest speed a car can reach in a straight line. Currently, the SSC Tuatara holds the record, though there's some controversy surrounding the verification of that record. Other contenders frequently mentioned include the Bugatti Chiron Super Sport 300+ and the Hennessey Venom GT. These speeds are achieved under highly controlled conditions.
* 0-60 mph: This measures acceleration, how quickly a car can go from a standstill to 60 miles per hour. Many hypercars boast incredibly fast 0-60 times, often under 2 seconds. The exact fastest is constantly changing as new models are released.
Therefore, there's no single "fastest car." The answer depends on the specific metric used to measure speed.