Top speed is 250 mph, but what's arguably more impressive is the acceleration—McLaren quotes a 12.8-second 0-186 mph time. For reference, a Bugatti
Chiron—which has 465 more horsepower—does the same in 13.1 seconds; McLaren's own P1 takes 16.5 seconds to do it. Though, the Koenigsegg One:1 has the Speedtail beat with an 11.92-second 0-186 mph run.