Im using:
Drag== Chevrolet Chevelle SS
Speed== Nissan GTR (Not the prototype)
Drift== Toyota Corolla
Grip== Nissan GTR (Not the prototype)
The Nissan GTR grips the road like nobodys business and flies through turns.The Corolla is easy to control and the Chevelle is fast.
The Chevrolet Chevelle SS is what I used for drag too.