Whatever. They gave themselves that target, in one way or another, as has been covered thoroughly in this thread there are reasons that that is an incredibly demanding goal, possibly not doable, the knock-on effects of chasing that goal are that there's an 1100hp 1100kg monster coming down the pipe, with the most serious underbody aero available this side of a professionally developed hillclimb special. That's cool as all hell (might freeze over?).
And it looks incredibly purposeful on track:
https://media.astonmartin.com/aston-mar ... lverstone/
Palmer and Horner are the ones on record as making those F1 claims, whether of the state of the project's engineering having reached that or whether it was intent is unclear due to the way they've been quoted. Those two are also notorious for being unreliable.
The corollary to all of this is that there are a littany of performace avenues reopened when you throw out the sporting regulations. ...Which
is also a topic that has been hashed to death in this thread.