The Nissan C-series was an inline-four automobile engine produced by Nissan from 1957 to 1964. It displaced and produced and . It was a pushrod engine and used single or dual-26 mm carburetors.
The C engine was derived from the Nissan 1H engine, which was itself a license-built version of the 1.5 BMC B-series engine that used a bore and stroke. To create the C engine, Nissan, advised by American engineer Donald Stone (formerly of Willys-Overland), reduced the stroke of the 1.5 engine from . The resultant C1 engine was called the "Stone engine" in his honor. When the capacity was later increased to 1.2 L by an increase of stroke from , it was called the Nissan E engine.
The Nissan C engine was replaced by the Nissan A engine in the 1967 Nissan Sunny B10. Its 1-litre A10 unit used the same bore and stroke as the C engine.