After acquiring the MP1 and the Charger you will unlock two more events, head to the north most speed event and beat the target speed of 170mph in the P1. You will then have an area on your map to search for the Veyron, once you find it you'll be place into a head to head race , win it to unlock a circuit race. For those players that are colour blind and are struggling to find the area knifehim says 'Just below saint-martin text, the lancer evo.8 MR bucket list is inside the area'
Beat the Veyron in the race and the car is yours. Fast travel back to the garage using
on the map and the achievement is yours once you enter.