How did the Ford GT with 1700 hp by PPR reach 453 kph in one mile, if Agera RS, with only 360 hp less, needed 4 miles to reach 457 kph?

How did the Ford GT with 1700 hp by PPR reach 453 kph in one mile, if Agera RS, with only 360 hp less, needed 4 miles to reach 457 kph?

Gearing, most likely. Final drive gear ratio probably different.

It is all in the torque! While top speed is a function of horsepower, how fast a car can get there's determined by torque. But 360 HP less is a big chunk of HP. That is 20% less horse power and it took four times as long.