According to the search results, there are different opinions on the fastest car in Forza Horizon 5 when fully upgraded. Here are some of the top contenders:
- Hennessey Venom F5: According to MotorTrend, this car has the fastest top speed of any car in the game, including tuned cars.
- Koenigsegg Bob: According to a YouTube video, this car is the fastest in the game and has been since the beginning of Forza Horizon 5.
- Jesko: According to a Reddit post, this car has the highest top speed in the game.
- Rimac C_Two: According to a YouTube video, this car has a top speed of 291 mph, making it one of the fastest in the game.
- Bugatti Divo: According to Top Speed, this car has a top speed of 236 mph.
Its worth noting that different sources may have different opinions on the fastest car in the game, and that factors such as track design and handling can also affect a car's performance.