The Toyota R family was a series of inline-four gasoline automobile engines. Designed for longitudinal placement in such vehicles as the Celica and Hilux and in production from 1953 through 1997, usage faded out as many of Toyota's mainstream models moved to front-wheel drive. Overhead cam (OHC) versions featured a chain-driven camshaft.

The Toyota Celica is an automobile produced by Toyota from 1970 until 2006. The Celica name derives from the Latin word coelica meaning heavenly or celestial. In Japan, the Celica was exclusive to the Toyota Corolla Store dealer chain. Produced across seven generations, the Celica was powered by various four-cylinder engines, and bodystyles included convertibles, liftbacks, coupés and notchback coupés.