Talk:RACING SPIRIT/@comment-203.217.145.22-20170925142625/@comment-26829117-20170925153745

You need to get 34 trophies to unlock McLaren Generations which I'm guessing is your goal with the newly won McLaren P1™ GTR? That's going to require one of your cars upgrading to PR 83 without the Porsche 911 RSR (2015) which is just short of PR 84 required to complete the series.

The cheapest way would be to use the Aston Martin Vantage GTE which will cost you 255 for PR 83.0 (unverified) at 1333333 or 267 for PR 83.1 (unverified) at 3313333. If you are going to do this then upgrade to 1313333 and verify which of the remaining upgrades will get you over PR 83.

Whilst it is entirely up to you what you do, none of these cars is required to be upgraded for any other series so if you do use the Aston then you might as well upgrade it to 3353333 for PR 84 (verified) which will only cost you 165 more than the Porsche. You'll still need the Porsche to get the 100% reward eventually but that can wait for another day (you will lost the 20% showcase discount but there is another one in Masters of Speed if you haven't already passed level 15).

This series unlocks a lot of bonus series so it's well worth the effort. However, if you are short of gold and don't have the cars you might be better off waiting.