I don't think there's ANYTHING to say he can't drive fast in a straight line.
You don't need to know the specs of an engine to be able to drive.
You can embellish a car's age and still be able to drive.
Yu don't need much mechanical sympathy to be able to punch a few gears in a straight line.
#3170 showed that a genuine mid-500hp engine will be capable of high 10s / low 11s.
Lots of Kirkhams getting around with more power than that...
I think the Cobra will have the legs in the deep end, so he just needs to feed on enough gas to stay along side. Full noise and the whole shooting match in the second half of the track and there'll be some crying and soul-searching on the Ferrari forum...