What are the rarest cars available in Forza Horizon 5?

In Forza Horizon 5, some of the rarest cars players can seek are often those awarded for completing specific in-game challenges, seasonal events, or limited-time offerings. These vehicles frequently include pre-order exclusives, high-tier reward cars from the Forzathon Shop, or cars obtained through completion of the game’s story missions and accolades. Examples of such rare cars could include the 1965 Hoonigan Gymkhana 10 Ford Hoonicorn Mustang, the 1991 Hoonigan Gymkhana 10 Ford Escort Cosworth Group A, and special edition models like the Apollo Intensa Emozione. Rarity also extends to certain legendary cars that require players to invest a significant amount of time and effort to acquire them or can only be obtained via the game's auction house, sometimes at steep prices due to their scarcity and desirability among collectors.