W16 engine
{{Short description|German 16-cylinder piston engine}}
File:Volkswagen W16.jpg engine]]
A W16 engine is a sixteen-cylinder piston engine with four banks of four cylinders in a W configuration.
W16 engines are rarely produced, with the notable exception of the Volkswagen Group 8.0 WR16 engine, which has been used since 2005 in the Bugatti Veyron, Bugatti Chiron and their related models.
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Volkswagen Group
{{main|Bugatti W16 engine}}
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The W16 engine that Volkswagen Group uses in its Bugatti Veyron and Chiron has a displacement of {{convert|8.0|L|cuin|0|abbr=on}} and four turbochargers. It is effectively two narrow-angle VR8 engines (based on the VR6 design) mated at an included angle of 90 degrees on a common crankshaft.{{cite web|title=Photograph of the Bugatti W16 cylinder block|url=http://smgenglish.typepad.com/photos/uncategorized/2007/12/19/bugatti_w16.jpg |website=www.typepad.com |format=jpg image|access-date=30 December 2009}}
The most powerful version of this engine, installed in the Bugatti Bolide, generates {{convert|1361|kW|hp PS|0|abbr=on}} at 7,000 rpm.{{Cite web|url=https://www.caranddriver.com/news/a34494240/bugatti-bolide-concept-specs-revealed/|title = 1825-HP Bolide Concept is Bugatti's Biggest Flex Yet|date = 8 December 2020}}{{Cite web|url=https://www.motor1.com/news/451243/bugatti-bolide-reveal/|title=Bugatti Bolide Revealed with 1,825 HP and 311+ MPH Top Speed}}
At the 1999 Geneva Auto Salon, Bentley presented Hunaudières, a concept two-seated mid-engined car with an 8-litre W16 engine. The engine was the basis for the Bugatti Veyron.{{cite web|url=https://www.supercars.net/blog/1999-bentley-hunaudieres-concept/ |title=1999 Bentley Hunaudieres Concept |first=Nick |last=D. |work=Supercars Net |accessdate=9 November 2021}}
Another concept car from Volkswagen Group to have the W16 engine is the Audi Rosemeyer, introduced in 2000 and shown at various auto salons. The engine fitted to Rosemeyer is the only W16 variation to have five valves per cylinder.
Other manufacturers
File:1916 W16 Engine Gaston Mougeotte.jpg
In 1916, a rotary valve W16 engine was built in France by Gaston Mougeotte.{{cite web|url=https://all-andorra.com/gaston-mougeotte-engine-w16-from-1916/ |title=Gaston Mougeotte engine W16 from 1916 |date=11 June 2017 |work=All Andorra}}
The Jimenez Novia, a one-off sports car built in 1995, used a W16 engine with two crankshafts.{{Cite web|url=https://www.supercars.net/blog/1995-jimenez-novia-concept/ |title=1995 Jimenez Novia Concept |first=Nick |last=D. |date=24 February 2016 |work=Supercars Net |access-date=6 March 2018}} Built by combining four Yamaha FZR1000 inline-four motorcycle engines, the engine has a displacement of {{convert|4.0|L|cuin|0|abbr=on}}, eight camshafts and five valves per cylinder, and produces {{convert|560|bhp|kW PS|0|abbr=on}}.{{Cite news|url=https://www.autoblog.nl/nieuws/deze-supercar-met-w16-en-80-kleppen-ken-je-nog-niet-98003#post-98003 |title=Deze supercar met W16 en 80 kleppen ken je nog niet |last=Dizono |work=Autoblog NL |date=25 April 2017 |language=nl}}
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