Assertion: engine's design | /r/Synonym | red engine
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text: A 132.5 cu in (2.171 L) unit (known as the grey motor) was used until 1963, with a minor increase in displacement in 1960 to 138 cu in (2.26 L) when it was replaced by a newer Chevrolet based design (known as the red engine) which was offered in different capacities.