The LA engine is a family of overhead-valve small-block 90° V-configured gasoline engines built by Chrysler Corporation between 1964 and 2003. A replacement of the Chrysler A engine, they were factory-installed in passenger vehicles, trucks and vans, commercial vehicles, marine and industrial applications. Their combustion chambers are wedge-shaped, rather than polyspheric, as in the A engine, or hemispheric in the Chrysler Hemi. LA engines have the same 4.46 in (113 mm) bore spacing as the A engines.

The Chrysler A engine is an OHV small-block V8 gasoline engine built by Chrysler from 1956 until 1967. It featured polyspherical combustion chambers, and was offered in displacements from 276.1 cu in (4.5 L) to 325.2 cu in (5.3 L), and in various high-power configurations. It it began to be replaced by the wedge-head LA engine in 1964, and is not related to the hemispherical-head Hemi engine of the 1950s or 1960s.