Scale model Porsche 911 turbo, modeled inspired by Hotwheels' Tooned series of diecast cars.
Print 1 body and 4 wheels, correct scale should make the car sit around 52mm in its longest dimension, try playing around with the scaling at a factor of 10 :)
Use two pieces of 1.75mm filament for the axles (OR trimmed toothpicks work surprisingly well!), and a bit of glue to hold everything together! Tolerances may be large, depending on the accuracy of your printer.
Enjoy! Feel free to contact / comment if there are any issues.