Board Thread:Game Discussion/@comment-26455682-20150729153450/@comment-25956839-20150729212625

As you are already running the 8 lapper in Endurance Champions one of you LMP1 2015 must be PR94, have a look at RR3 Wiki:Upgrades Section (Classic Version) for each car, it will probably be less GC spend to upgrade one of the 2015 LMP1 cars to PR96 to run the new 10 lapper, but it will depend on what GC you have already spent, you only need to run one 10 lapper, the fame is similar. But work out your top car to PR96 and see for yourself.

Of the 2015 LMP1 cars the Audi R18 E-Tron Quattro (2015) is slightly cheaper [from R$ only upgrades] : Talk:Endurance Champions/@comment-173.38.209.9-20150612095353

The Audi R18 E-Tron Quattro (2014) will cost R$4,000,000 and an additional R$2,583,600 and 335Gold to upgrade it to PR94. Source: Thread:27145