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?

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