Do not do the same mistake than I did.
I was starting a second profile for a guest later in the day, and I decided to get those challenges as well, so I took the P1 LCE to sort this one out.
he he WRONG.
The limited P1 has better handling yes, but a lot lower top speed, and it would not go any quicker than 230 mph on the straight.
You definitely need the "normal" P1 for that challenge.