From Nekrasov's "Тройка"

Prease translate this two lines:
Не нагнать тебе бешеной тройки:
Кони сыты, и крепки, и бойки.

Really is the first line what mistakes me. Thanks.

You can't catch up the furious coach-and-three (i. e. a carriage harnessed with three horses, tiro de tres caballos)

Thanks.