Successfully complete the game to unlock the Lamborghini Miura in free ride mode.
London: Remove damage
Drive to the junkyard and find the red car located near the entrance. Race that car around the junk yard to remove the damage from your vehicle. The bus is recommended.
Turin: Hidden job
Drive to the roundabout and take the first right. Drive forward to reach the parking lot. Hit all the cones to get a job offer. Follow the on-screen arrows to get the job. The police car is recommended.
Mafia Mania: Easy completion
If you are stuck at the end when at Turin airport, turn around and go between the two Mafia cars, up the dirt pile, and over the fence. The Mafia will not follow you. Follow the path and you will end up at the hideout.
Ditch the Mafia quickly by going to a big mound by the fence in the corner. An intermission sequence will show the jump. Then, drive back to HQ using the hidden road. Do not worry -- it ends at the mansion. Practice this jump in free drive mode before attempting it.
Get past police car
Drive in a police car to race past other police cars. However, if you hit or even tap a police car, it will chase you.
Getting airborne
In the Keeping It Up level in London, after the turn with the café tables and chairs, turn right onto the sidewalk. Stay there, and you will see an incline. Go over that incline and your car will become airborne. Do not land on the building or the lamppost on the way down or you may lose Dave.