What is the fastest car?
In 2017, the Koenigsegg Agera RS reached a top speed of 447.19 km/h (277.87 mph).
<START_INST>What is the fastest car?<END_INST><START_CTX><END_CTX><START_A>In 2017, the Koenigsegg Agera RS reached a top speed of 447.19 km/h (277.87 mph).<END_A>