Absolutely possible to do it with DS3. At least I did it and I am NOT an alien driver.

:tup:
Exactly what he said. I did it with a DS3 (7:26.xx) after many months of procrastinating. My advice on this one is:
-Use the race line. It might be conservative, but it is still a nice reference point.
-Don't be afraid to push hard in certain areas. A lot of the time you don't THINK you will be able to carry much speed through a certain section, but in reality you might be able to take it 10-15 mph faster.
Practice, practice, practice. It took me many tries, but once you have driven on the Nurb a whole lot trying to get this trophy, your sector times will fall.
-Patience. Realize it will take many tries to get down a good lap, so sit aside a good amount of time one night with no distractions.
-Frustration will happen. Yes, you will get a perfect run only to red lap on the last corner or "that" turn. Just keep trying and remember to take a break once in a while. Trying to do this in a bad mood doesn't mix well lol.
-Don't worry about one minor mistake, but don't be fooled, to get the trophy you have to stay on the course 95% or more of the time to have any chance to achieve the time. I had an off track moment on my run to get the trophy, so you can make a few mistakes. Just make sure to try to make it up in other sections if possible.
I can't think of anything else right now, but I hope some of it helped. Good luck.

👍