A W8 engine is an eight-cylinder piston internal combustion engine in a W configuration. The W8 can be imagined as flat plane crank V8 engine combining two narrow-angle (15 degree) V4 engine blocks, mounted juxtaposed at 72 degrees to each other and coupled to one crankshaft. Nearly square external dimensions mean the large eight-cylinder engine will fit in the space typically taken by a V6 engine.