This can be done in 'Play' Mode with a customized race.
Select Belgium (in my opinion the easiest track) and press to customise the race.
Lap Amount - 9 (you can choose to have less if you wish)
Power Ups - Normal
Damage – Disabled
Modifiers - 'Project Orion' and click to add it (Permanent Boost)
CC – 1,000
The achievement pops as soon as the whole track is owned, therefore you do not need to finish the race should you get it before then.
Belgium has 7 sectors to grab, the only one that might catch you out is the one through the locked shortcut, so be sure to pick up the key situated on a path to the left as the rapids start, and use it to the right of the factory entrance.
Singapore also seems to be a popular choice to get this achievement however not tested this myself (Credit to Blue n Gold Eel).