Board Thread:Game Discussion/@comment-32697486-20170727111248/@comment-26829117-20170727152817

The BMW can be bought and upgraded using R$ to complete the series, the Porsche costs gold and needs upgrading with gold. So the recommended strategy is to buy the BMW and upgrade it, as R$ is much easier to accumulate than gold.

However, you've also stumbled upon an area where the strategy is out of date. If you are going for 100% completion then you will be fully upgrading the Porsche eventually as it has an exclusive series. Therefore the upgrades on the Porsche are effectively offset by savings later on.

The long and the short of it is that you require both cars to complete the career series. If you are short of gold then buy the BMW. If you are flush with gold then buy the Porsche. If you are really flush then buy them both as you will need to eventually.

Note: I would never normally advise buying a gold car without a sale or discount but this car is relatively cheap and is unlikely to ever be on offer.