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Porsche flat-6 engine Flat-6 engine in an older air-cooled 911. The Porsche flat-six engine series is a line of mechanically similar, naturally aspirated and sometimes turbocharged, flat-six boxer engines, produced by Porsche for almost 60 consecutive years, since 1963.
The engines were air-cooled until 1999, when Porsche started using water-cooled engines. [6] Other Porsche models that use flat-six engines are the 1970–1972 Porsche 914/6 , the 1986–1993 Porsche 959 (rear-engine), and the 1996–2021 Porsche Boxster/Cayman (mid-engine).
See Porsche 911. 901/05 boxer flat-six 901/02 on 1968 911S 911/ ... 140 kW (190 PS; 188 bhp) air-cooled, four-stroke flat-six (914/6 R, 914/6 GT) 1970–1972 2.3 L ...
The last flat-six-powered Porsche prototype was the Le Mans-winning 911 GT1-98. Since then, its prototypes have used V-4 and V-8 engines. Here's why.
The Type 996 introduced in 1998 represented two major changes for the venerable 911 lineage: a water-cooled flat-6 engine replaced the popular air-cooled engine used in the 911 for 34 years and the body shell received its first major re-design. Changing to a water-cooled engine was controversial with Porsche traditionalists, who noted this as ...
Porsche's 914/6 variant featured the 2.0 L air-cooled Type 901/3 flat-six engine from the 1967–1969 911T model. This was the least powerful flat-six in Porsche's lineup. This engine had revised pistons that reduced the compression ratio to 8.6:1.
During the 1990s, Porsche was facing financial troubles and rumours of a proposed takeover were being spread. The signature air-cooled flat-6 of the 911 was reaching the limits of its potential as made evident by the 993. Stricter emissions regulations worldwide further forced Porsche to think of a replacement of the air-cooled unit.
Flat engines offer several advantages for motorcycles including a low centre of mass, low vibration, suitability for shaft drive, and equal cooling of the cylinders (for air-cooled engines). [5] [6] The most common design of flat engine for motorcycles is the boxer-twin, beginning with the 1905 Fée flat-twin engine, manufactured by the Light ...
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