Straight-seven engine

A straight-seven engine, also referred to as a straight-seven or inline-seven engine, is an internal combustion engine configuration with seven cylinders arranged in a straight line along the crankshaft. This design follows the same principle as other inline engines, including more common configurations like inline-four and inline-six engines. While inline engines are typically found with four, six, or eight cylinders, the straight-seven is quite rare and primarily exists in theoretical designs or specialized applications.