Text: i'm convinced that the small V eight like the the Mustang's original two eighty nine or some of the Chevy two eighty threes were good little V eight engines that were not gas guzzlers but they had enough power to pull all this weight And the four cylinders just don't have it
Entailment: I'm convinced that Mustang 289s or even Chevy 283s were better engines than four cylinders.
Contradiction: Four-cylinder engines clearly outperform old Mustang and Chevy V-8 engines.