View source for Lancia Flat-4 engine

A '''flat-4''' is a four cylinder [[internal combustion engine]] where the cylinders are arranged in a [[flat engine|flat configuration]].  As of today Flat-4 engines are '''boxer engine''', also known as a '''horizontally opposed engine''', in which the corresponding pistons reach [[top dead centre]] simultaneously, thus balancing each other with respect to momentum. Flat engines with four or fewer cylinders are most commonly boxer engines.  This is not a common configuration, but some brands of [[automobile]] have favored such engines and it is a common configuration for smaller [[aircraft engine]]s such as made by [[Lycoming]] or [[Continental Motors|Continental]].  Although they are considered to be superior to[http://ca.geocities.com/amp276online/alladin-casino-hotel-in-las-vegas.htm ...]