There is no simple answer to this question as it depends on a number of factors. In general, the 392 is faster than the Hellcat, but there are a few things that can affect this. For example, if the Hellcat has been modified or tuned in any way, it could be faster than the 392. Similarly, if the392 has been modified or tuned, it could be faster than the Hellcat. It also depends on what type of driving you're doing. If you're just looking for straight-line speed, then the 392 is probably going to be faster. However, if you're looking for overall performance and handling, then the Hellcat might be a better choice. Ultimately, it all comes down to personal preference and what you're looking for in a car.