'1970' Road Runner '383' vs. AMC Rebel Machine '390'

I don't remember if it was AMC advertisements for this car or another AMC performance car.
I would have fired the copy writer.
It went something like "it isn't as fast as a HEMI Cuda, but it is pretty quick"
This was in an AMC ad copy that I read once. Not the best way to try & sell a performance car, by apologizing for it.