Board Thread:Game Discussion/@comment-27095714-20160205065247/@comment-26249703-20160205085808

It's a question of how many trophies you need to unlock the last tier, versus how many events you can complete with car-exclusive events or events with PR requirements.

You unlock all three LMP1s when entering the series, meaning you can choose to get whichever, though Audi doesn't require Gold, meaning you can then get the other two on discount by unlocking their respective showcase.

Without recalling the actual numbers, though I explained it further here, you can replace showcase events for two of the LMP1s with PR:94 events.