Lancia produced several narrow-angle V4 engines from the 1920s through 1960s for cars like the Lambda, Augusta, Artena, Aprilia, Ardea, Appia, and Fulvia. These were a predecessor for Volkswagen's VR6 family.
V4 engines are also sometimes found in motorcycles, for instance the
Another use of the V4 engine is in outboard motors. They are two stroke cycle and generally carbureted. Some of the largest manufacturers are Johnson, Evinrude and Yamaha. This type of engine is popular because of their small size, while still allowing 140+ horsepower.
A common mistake is to refer to the much more common inline 4 as a V4.