It also depends greatly on the professor-
In college I once gave a lecture on how to tune a nitro r/c car,
Got an excellent grade- took me all of 2 hours to complete. In a different class I did a paper on irrational fear and phobias, went really in depth into the subject (honestly weeks of research, even talked to a therapist who specialized in phobias), and got a just passing grade.
Why not do a paper on the different car cultures? Tuners vs Muscle or
Imports vs Domestics. Or the best sports car ever produced? Not your opinion, but based on the numbers (speed, 0-60, skidpad, you know, the works).