This is probably doable with many cars as I did this using a Ferrari 488 GTB '15 with 9.0 Power and 9.8 High Speed. But the important thing is to have a 1 x 15LB nitrous tank. With the car's top speed of only 233MPH (375km/h), the long nitrous boost will get you to 241MPH (388km/h).
An easy spot to this is during a day time sprint race called Columbia (at the intersection of the 2 highways in the middle of the map). There will be a nice downhill straight where the label of "Fairview Fields" is on the map. With your car probably at 400+ and opponents at 320, you will have the road to yourself.