Basically, these numbers should be taken with at least a +/-0.5sec "grain of salt" and are pretty meaningless except to separate between a 4.0sec super car, a 6.0sec sports car, an 8.0sec fast sedan, a 10sec sedan and a 12sec minivan -- and one doesn't really need numbers to make those distinctions, as eyeballing + hp/torque/weight data would suffice.
Z.
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