The cars I use actually Overlap the other opponents sometimes.
Grip : I actually have a few cars that I use the ccx being good then Lamborghini galiargo ( I swear that's spelled wrong ). And a pangani Zonda R
For speed: The CCX out runs all cars during the speed boss with Nate Denver from the start he's infront for three seconds befor I speed past him
Top speed 248 finished a race in 30 seconds in the speed challenges the markers appear every about every 2-3 seconds from 3/4 to 1/2 is a bout 1 second at top speed with everything upgraded
Drag: Zonda of all things again finished a quarter in 5.67 seconds just now with boost and it had an impressive wheelie the WHOLE way my total score in finishing the race is 12,339. Does a half mile in 10.81 ,11.41 and 9.99 my best . Wheelie competion 1,134 being my best as it was the entire track from tuning it. To the settings for a wheelie for a Plymouth
Don't know about drift but I use a Elise and do pretty good