Thread:RR3 Michael P/@comment-26496977-20150726081611/@comment-26793627-20150726103445

Buying the Porsche RSR in advance (or on sale, if you are lucky to find one!) will indeed open up the Endurance Kings subseries, since it's a gold purchase and a gold purchase gives you access to any bonus series the car is featured in. I unlocked mine by by buying the RSR 2014 which was on 60% discount at the time, which let me purchase it for 260 GC. :)

But you know what, I'm not really sure that purchasing the RSR is the right way to go forward if you want to be able to purchase the Audi E-tron for farming the 10 lapper. That's because, the first tier of Endurance kings has a speed record, an elimination and a cup race to contend to. The cup race is doable, and I remember it was pretty easy actually, as it has no PR restrictions, but I don't fancy the RSR chances against the LMP's in the other two events. You need to win one of these events to unlock the Porsche showcase (tier 2 & 3), and need to win atleast 2 races (if I remember correctly) to unlock the fourth tier. And after that, barring the Porsche 919 Hybrid's showcase (which you presumably don't have), you need to overcome either a speed snap or a drag race in 4th tier to unlock the Audi. Because the third race in the 4th tier is a cup race with PR requirement of 90.0, which is insane for the RSR. And unfortunately, the RSR's fall woefully short of the LMP's in all respects. You need to advance through the first 4 tiers to reach the Audi showcase so you can unlock the Audi. And I think that only a LMP can help you do that. If I were you and considering this line of thought, I'd rather buy the Toyota TS040 Hybrid, since Porsche will be yours for free when you complete the 24h to Le Mans challenge later on and the Audi can be obtained for R$.

Of course, you can try slowing down the bots early on, in the first tier, and still get through with the RSR. Let me know if you did!