A flat-four engine, also known as a horizontally opposed-four engine or boxer engine, is a four-cylinder piston engine with two banks of cylinders lying on opposite sides of a common crankshaft. The most common type of flat-four engine is the boxer-four engine, each pair of opposed pistons moves inwards and outwards at the same time.
In a piston engine, the cylinder head sits above the cylinders, forming the roof of the combustion chamber. In sidevalve engines the head is a simple plate of metal containing the spark plugs and possibly heat dissipation fins. In more modern overhead valve and overhead camshaft engines, the head is a more complicated metal block that also contains the inlet and exhaust passages, and often coolant passages, Valvetrain components, and fuel injectors.
A W8 engine is an eight-cylinder piston engine with four banks of two cylinders each, arranged in a W configuration.
The VR6 engine was a six-cylinder engine configuration developed by Volkswagen. The name VR6 comes from the combination of German words “V-Motor” and “Reihenmotor” meaning “inline engine” referring to the VR-engine having characteristics of both a V-layout and a inline layout. It was developed specifically for transverse engine installations and FWD vehicles. The VR6 is a highly compact engine, thanks to the narrower angle of 10.5 to 15 degrees between cylinder banks, as opposed to the traditional V6 angles ranging from 45 to 90 degrees. The compact design is cheaper to manufacture, since only one cylinder head is required for all six cylinders, much like a traditional inline-6 engine.
The Volkswagen Type 2 (T3) was the third generation of the Volkswagen Transporter. It was marketed under various nameplates worldwide – including the Transporter or Caravelle in Europe, Type 25 (T25) in the UK, Microbus and Kombi in South Africa/Brazil/Australia, Kampeerauto in Netherlands, Combi in France and Vanagon in North and South America.
A flat-eight engine, also called a horizontally-opposed eight, is an eight-cylinder piston engine with two banks of four inline cylinders, one on each side of a central crankshaft, 180° apart.
The Volkswagen G60 and G40 were inline–four-cylinder automobile petrol engines, which used a specific method of forced induction by way of a scroll-type supercharger. The G60 engine was formerly manufactured by the German automaker Volkswagen Group and was installed in a limited number of their 'hot hatch' cars from their Volkswagen Passenger Cars marque from August 1988 to July 1993.
The Volkswagen D24 engine is a 2.4-litre inline-six-cylinder (R6/I6), naturally aspirated diesel engine, formerly manufactured by Volkswagen Group from 1978 to 1995.
The Volkswagen D24T engine is a 2.4-litre inline-six-cylinder (R6/I6) single overhead camshaft (SOHC) diesel engine, formerly manufactured by Volkswagen Group from December 1982 to July 1992.
The Green D.4 was a four-cylinder watercooled inline piston engine produced by the Green Engine Co in the UK in 1909. It produced about 60 hp (45 kW) and played an important role in the development of British aviation before World War I.
The Asso XI was a family of water-cooled, supercharged V12 piston aeroengines produced in the 1930s by Italian manufacturer Isotta Fraschini, and fitted on a number of aircraft types built by CANT, Caproni and others.
A Heron cylinder head, or simply Heron head, is a design for the combustion chambers of the cylinder head on an internal combustion piston engine, named for engine designer S. D. Heron. The head is machined flat, with recesses only for inlet and exhaust valves, spark plugs, injectors and so on. The combustion chamber itself is contained within a dished depression in the top of the piston. The Heron head is suitable for petrol and diesel engines, for ohv and ohc valve-gear, and for small and large engine displacement capacities.
The Fiat AN.1 was an experimental Italian water-cooled diesel straight six cylinder aircraft engine from the late 1920s.
The Ferrari flat-12 engine family is a series of flat-12 DOHC petrol engines produced by Ferrari from 1964 to 1996. The first racing Ferrari flat-12, the Mauro Forghieri-designed Tipo 207, was introduced in the Ferrari 1512 F1 car in 1964. Later flat-12 racing engines were used in Ferrari Formula One and sports racing cars from 1968 until 1980, including the 212 E Montagna, 312 B series, 312 PB and 312 T series. The roadgoing flat-12 engines were introduced with the 365 GT4 BB and were produced in various versions until the end of F512M production in 1996.
German carmaker Porsche built several series of flat-eight engines of differing displacements over the course of many years. They were mainly used in Porsche's racing cars.
