The Opel 1.8 Liter was a series of full-size cars that were introduced for the 1932 model year. The 1.8 Liter was offered in sedan, convertible, and touring body styles, and was powered by a 1.8L inline six engine. This 32hp powerplant sent its power to the rear wheels via a manual transmission, which was a 3 speed unit for the first years of production, but a 4 speed unit was introduced in 1933. Production of the Opel 1.8 Liter lasted until 1933.