This will take you approximately 35 a 40 minutes. You can crash one or two times as long as you take as many extra seconds as you can. You can grab extra seconds by passing by cars really close. The closer you pass by the more seconds you gain. This varies from 1 to 3 seconds. So chase every car you see and grab those extra seconds.
Tip: do use the brake (B) during the in between stage sections when overtaking the car in front of you seems to be difficult. You don’t want to crash.
Nb: I completed it with the Penetrator 8086: the car you will win by beating the final race aka boss. With a lesser car this is maybe doable without crashes.