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Flat Plane Vs Cross Plane V8 engines. A flat plane V8 (animated on the left) is very much like two inline-4 engines mated together in a V configuration. Therefore end-to-end balance is inherent, as the first and last piston of a bank is always exactly in the same position, as are the center two pistons on each bank.
Related QuestionsMore Answers Below. 1  A Boxer (flat) engine is low and flat. 2  The V engine is, well in the shape of a V. The V, therefore, occupies more height and therefore needs a taller engine bay. 3  An inline is long and narrow.