Porsche flat-six engine
Porsche flat-6 engine | |
---|---|
Overview | |
Manufacturer | Porsche |
Production | 1963–present |
Layout | |
Configuration | flat-6 |
Displacement | 2.0–4.2 L (122–256 cu in)[1] |
Cylinder bore | 80–102.7 mm (3.1–4.0 in)[2][3] |
Piston stroke | 66–80.4 mm (2.6–3.2 in)[4][5] |
Valvetrain | 12-valve to 24-valve, SOHC/DOHC, two-valves per cylinder to four-valves per cylinder[6] |
Combustion | |
Turbocharger | Yes (some models) |
Fuel system | Mechanical fuel injection Carburetor Direct fuel injection |
Fuel type | Gasoline |
Oil system | Dry sump |
Cooling system | Air-cooled[7] Water-cooled |
Output | |
Power output | 110–850 hp (82–634 kW) |
Torque output | 119–730 lb⋅ft (161–990 N⋅m) |
Dimensions | |
Dry weight | 387–507 lb (176–230 kg) |
![](http://upload.wikimedia.org/wikipedia/commons/thumb/3/3d/Porsche_mg_2167.jpg/220px-Porsche_mg_2167.jpg)
![](http://upload.wikimedia.org/wikipedia/commons/thumb/8/8e/Number_01_G-series_9eleven_flat6engine_%286268827622%29.jpg/220px-Number_01_G-series_9eleven_flat6engine_%286268827622%29.jpg)
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.[8][9] The engine is an evolution of the flat-four boxer used in the original Volkswagen Beetle.[10][11][12]
The flat-six engine is most often associated with their 911 model, Porsche's flagship rear-engined sports car which has used flat-six engines exclusively since 1963.[13] The engines were air-cooled until 1999, when Porsche started using water-cooled engines.[14][15][16][17]
In April 2011, Porsche announced the third generation of the 997 GT3 RS with an enlarged 4.0-litre engine having a power output of 500 PS (368 kW; 493 hp). The naturally-aspirated 4.0-litre flat-six engine (the largest engine offered in a street-legal 911) was introduced with their 911 (997) GT3 RS 4.0, in 2011.[18] The engine itself uses the crankshaft from the RSR with increased stroke dimensions (from 76.4 mm to 80.4 mm). This change increased the power output to 500 PS (368 kW; 493 hp) at 8,250 rpm and 460 N⋅m (339 lbf⋅ft) of torque at 5,750 rpm.[19] giving it a power-to-weight ratio of 365 hp per ton. Only 600 cars were built.[18][20] At 493 hp (368 kW),[21] the engine is one of the most powerful six-cylinder naturally aspirated engines in any production car with a 123.25 hp (92 kW) per litre output.[22][6][23][24][25]
Other Porsche models that use flat-six engines are the 1970–1972 Porsche 914/6 (mid-engine), the 1986–1993 Porsche 959 (rear-engine), and the 1996–2021 Porsche Boxster/Cayman (mid-engine).[26][27][28]
The Porsche 962 sports prototype also used a twin-turbocharged flat-six engine.[29][30][31][32]
Applications
[edit]Road cars
[edit]Porsche
[edit]- 1963–present Porsche 911
- 1963–1989 original Porsche 911
- 1989–1993 Porsche 964
- 1994–1998 Porsche 993
- 1997–2006 Porsche 996
- 2004–2013 Porsche 997
- 2011–2019 Porsche 991
- 2019–present Porsche 992
- 1970–1972 Porsche 914/6[33]
- 1986–1993 Porsche 959
- 1996–present Porsche Boxster[34]
- 2005–present Porsche Cayman[35]
Race cars
[edit]- Porsche 914/6 GT
- Porsche 934[36][37]
- Porsche 934/5[38]
- Porsche 935[39][40][41][42][43][44]
- Porsche 936
- Porsche 956
- Porsche 961
- Porsche 962
- Porsche WSC-95
- Porsche 911 GT1
- Porsche 911 GT2
- Porsche 911 GT3[45]
- Riley MkXI/Riley MkXX/Riley MkXXII/Riley MkXIVI
References
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- ^ "GT3 Engine Displacement". Performance Developments. Archived from the original on 10 March 2022. Retrieved 14 August 2024..
- ^ "Porsche twin-cam 6-cylinder engine". 19 January 2018. Archived from the original on 17 May 2022. Retrieved 7 April 2022.
- ^ "Porsche 911 GT3 RS 4.2 could get 518bhp from enlarged flat six". Archived from the original on 7 April 2022. Retrieved 7 April 2022.
- ^ a b "Flat Sixy: The Evolution of the Porsche 911 in the U.S." 13 December 2013. Archived from the original on 19 October 2021. Retrieved 19 October 2021.
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- ^ "Dr. Ing. h.c. F. Porsche AG". Production anniversary of the Porsche 911. Archived from the original on 19 October 2021. Retrieved 19 October 2021.
- ^ "1963 – 1964 Porsche 911 (901) @ Top Speed". Top Speed. 10 August 2015. Archived from the original on 23 April 2023. Retrieved 19 October 2021.
- ^ "The flat engine tradition". Porsche Newsroom. 3 July 2018. Archived from the original on 19 October 2021. Retrieved 19 October 2021.
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- ^ "The flat engine tradition". 3 July 2018. Archived from the original on 19 October 2021. Retrieved 19 October 2021.
- ^ "Flat Sixy: The Evolution of Porsche 911 Engine Size, Technology, and Output in the U.S." www.caranddriver.com. 13 December 2013. Archived from the original on 21 September 2019. Retrieved 21 September 2019.
- ^ House, © Future Publishing Limited Quay; Ambury, The; Engl, Bath BA1 1UA All rights reserved; number 2008885, Wales company registration (18 November 2015). "Flat six engine: A Porsche 911 history". Total 911. Archived from the original on 19 October 2021. Retrieved 19 October 2021.
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- ^ "Flat Six Innovations – Porsche Engine Experts". Archived from the original on 19 October 2021. Retrieved 19 October 2021.
- ^ a b The Gary Stock Company + Porsche Cars North America, Inc. "Porsche 911 GT3 RS 4.0: Biggest 911 Engine Ever Offered". Archived from the original on 16 April 2015. Retrieved 16 April 2015.
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