Chrysler A engine
The Chrysler A engine is a small-block V8 gasoline engine built by Chrysler with polyspherical combustion chambers. It was produced from 1956 until 1967, when it was replaced by the wedge-head LA engine. It is not related to the hemispherical-head Hemi engine of the same era.
Oil engine
An oil engine is an internal combustion engine that is powered by the burning of fuel oil, as opposed to external combustion engines, such as steam engine. The term usually refers to low compression engines, so the diesel engine is usually not included.