What is the fastest car?
In 2017, the Koenigsegg Agera RS reached a top speed of 447.19 km/h (277.87 mph).
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.
### Instruction: What is the fastest car?
### Input: 
### Response: In 2017, the Koenigsegg Agera RS reached a top speed of 447.19 km/h (277.87 mph).