It depends on the specific year and model of both the Mustang and the Viper. The Dodge Viper, especially the higher performance versions (like the ACR), was generally known for its raw power and speed. However, certain high-performance Mustang models (like the Shelby GT500) can rival or even exceed the Viper's performance in certain areas, such as acceleration.
There's no single definitive answer. You need to compare specific models and their performance specs to determine which is faster.
