A W engine is a type of piston engine where three or four cylinder banks use the same crankshaft, resembling the letter W when viewed from the front.[1][2][3]
W engines with three banks of cylinders are also called "broad arrow" engines, due to their shape resembling the British government broad arrow property mark.[1][4]
W engines are less common than V engines. Compared with a V engine, a W engine is typically shorter and wider.
The W, or broad arrow engine, has three rows of cylinders of which the central row is vertical with the other two rows forming equal angles with the vertical.
W engine is similar to a V engine but with three banks of cylinders. The two V angles are usually equal.
W-engine Same as V-engine except with three banks of cylinders on the same crankshaft.