I think LOW4LYF missed the forums. Tesla page is here
https://forums.tesla.com/.
You will not be able to tell a difference between a 3.5 and a 4.0 0-60, but you will definitely be able to tell a nice V8 from a crappy I6. Sound delivers more pleasure than a .5 0-60 or quarter mile improvement. An M5 may be faster, but will never sound as good as a Hellcat. If all you care about 1/4 times, why not just get a motorcycle?