Enter the Hellephant.

Car and engine aside, I think the whole Hell-whatever is a name fail.
I would not buy any of it just because of the name.
(But that's me).

Hellcat. Sounds like a Mercury or a Buick.
Oh, we wanted it to sound like a WW2 Airplane.
I'd call it a War Hawk before I went to Hell.
(OR ANY THING HAWK)

Just two other ideas off the top of my pointy little head instead of Hellcat.

Why not play off a Road Runner or Super Bird?
Merlin. (It's a bird or a wizard. Take your pick).
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Why not play off of the B Body and Super Bee?
Wasp.
You could do a lot with that logo.
Or even Yellow Jacket.
.


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An Elephant is fine for a cute engine nick name.
It may be powerful, but an elephant is slow.
Name fail.
Hellephant?
Sounds like they couldn't make up their mind.