Undersquare, also known as subliterary or undersized, refers to an engine configuration where the bore diameter is smaller than the stroke length. Its opposite, oversquare, suggests the bore is larger than the stroke. Undersquare engines traditionally offer greater torque production due to a longer piston stroke and increased piston area. While oversquare engines tend to provide higher power output by allowing more room for larger valves. Additionally, undersquare can be substituted by the term "long-stroke" or "short-stroke" depending on the context. These synonyms help enthusiasts and engineers communicate engine specifications and characteristics accurately, ultimately contributing to a better understanding and comparison of different motors.