They only buy a very small number of them compared to other squad cars, I'm pretty sure the Escalade in my last post is for special cases because I NEVER see them around.
Also, an IndyCar going around Indianapolis can reach speeds of up to 235-240 MPH on the long straights. Maybe we will get lucky and Scawen might put a Dallara lookalike into the game
The Dallara IndyCar has about 650 HP IIRC, but there would be no point restricting the BF1 since it has so much downforce slowing it down even with the wing angles at 0 degrees.