*I will update this post as more information is found.

The latest version, v2.6, has been released.

Here is the description:

Real Racing welcomes the legendary Countach and limited edition Miura - race in style through the new Classic Lamborghini Update!

- Classic Lamborghinis: The Miura and Countach were the most distinctive cars of their time, redefining the concept of sport cars.

- Next Level Multiplayer: Compete in intense 8-player, cross-platform, real-time racing with drafting.

- Clash of the Classics: This new Series sees three iconic manufacturers battle to claim their place in supercar history.

- Enhanced Race Replays: Follow the action in true TV style, including aerial and wheel cameras.

- Racing School: Hone your skills in our brand new Racing School and win a FREE BMW Z4sDrive35is!

- Redesigned main menu: clearly displays your career progress and streamlines navigation.

The main menu has now been organized into 7 categories: Amateur, Pro/Am, Pro, Expert, Master, Elite, and Legend respectively. Each category houses their respective series and sub-series.

The new Clash of the Classics sub-series is located in the Legend category and can be seen under the Supercar Elites series. The cars available for use in this sub-series are the Porsche Carrera RS 2.7 (1972), Lamborghini Countach, Shelby '66 Cobra 427, and Lamborghini Miura. 

The Miura costs 490 gold to buy. It is currently locked and will unlock in approximately 6 days from today (the 20th). It seems as though the car will be available for purchase for a specific time frame before it expires from the game until it becomes available for purchase again at a later date. The Miura was made available on the 20th before it expired later the same day. The next time the Miura will be available for purchase will the the 26th.

The Countach costs 210 gold to buy.