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The M297 is a V12 engine produced by Mercedes-Benz, from 1997 to 2016.

Mercedes-Benz M297
Overview
Manufacturer	Mercedes-Benz
Production	1997–2016
Layout
Configuration	Naturally aspirated 60° V12
Displacement	6.9 L; 420.9 cu in (6,898 cc) 7.3 L; 444.9 cu in (7,291 cc)
Cylinder bore	89 mm (3.5 in) (6.9 L) 91.5 mm (3.60 in) (7.3 L)
Piston stroke	92.4 mm (3.64 in)
Block material	Aluminium alloy
Head material	Aluminium silicon
Valvetrain	DOHC 4 valves x cyl.
Compression ratio	10.5:1 10.0:1 (SL 73 AMG)
Combustion
Fuel system	Multi-point fuel injection
Fuel type	Gasoline
Cooling system	Water-cooled
Output
Power output	386–559 kW (525–760 PS; 518–750 hp)
Torque output	750–900 N⋅m (553–664 lb⋅ft)
Chronology
Predecessor	Mercedes-Benz M163 engine
Successor	Mercedes-Benz M158 engine Mercedes-Benz M137 engine (AMG)

Design

The M297 is based on the M120 engine but has been tuned by AMG for use in high-performance sports cars. It was offered as a 6.9 L (6,898 cc) version with a bore and stroke of 89 mm × 92.4 mm (3.50 in × 3.64 in), respectively, and was only available in the road-legal version of the CLK GTR.[1] A 7.3 L (7,291 cc) unit was also available featuring a larger bore of 91.5 mm (3.60 in), and was used in Pagani Zonda models until 2016.[2]

Engines

Displacement	Power output	@ rpm	Torque	@ rpm	Years
6,898 cc (6.9 L; 420.9 cu in)	450 kW (612 PS; 603 hp)	6,800	775 N⋅m (572 lb⋅ft)	5,250	1997-1999
7,291 cc (7.3 L; 444.9 cu in)	386 kW (525 PS; 518 hp)	5,500	750 N⋅m (553 lb⋅ft)	4,000	1997–2001
	408 kW (555 PS; 547 hp)	5,900		4,050	2001–2006
	442 kW (601 PS; 593 hp)	6,150	760 N⋅m (561 lb⋅ft)	4,000	2004–2008
	478 kW (650 PS; 641 hp)	6,200	780–900 N⋅m (575–664 lb⋅ft)		2006–2011
	492 kW (669 PS; 660 hp)				2010
	498 kW (677 PS; 668 hp)				2009–2010
	559 kW (760 PS; 750 hp)	8,000		3,900	2012–2016
	588.5 kW (800 PS; 789 hp)				2017

M297

386 kW version

• 1997–2001 R129 SL70 AMG SL73 AMG
• 1992–1999 C140/W140 CL70/S70 AMG CL73/S73 AMG[3]^{[circular reference]}

408 kW version

• 2001–2004 Pagani Zonda S 7.3[4]
• 2003–2006 Pagani Zonda S Roadster[5]

442 kW version

• 2004 Pagani Zonda S Monza
• 2005–2008 Pagani Zonda F[6]

450 kW version

• 1997-1999 CLK GTR Straßenversion (6.9 L)

478 kW version

• 2006–2011 Pagani Zonda F Clubsport
• 2006–2009 Pagani Zonda F Roadster[7]
• 2009 Pagani Zonda PS

492 kW version

• 2010 Pagani Zonda Tricolore[8]

498 kW version

• 2009–2010 Pagani Zonda Cinque[9]
• 2010 Pagani Zonda Cinque Roadster[10]
• 2010 Pagani Zonda HH

559 kW version

• 2012 Pagani Zonda 760LH
• 2012 Pagani Zonda 760RS
• 2012 Pagani Zonda 764 Passione
• 2014 Pagani Zonda LM
• 2014 Pagani Zonda X
• 2015 Pagani Zonda 760 Zozo
• 2015 Pagani Zonda 760 AG Roadster
• 2015 Pagani Zonda Kiryu
• 2016 Pagani Zonda OLIVER Evolution

588.5 kW version

• 2017 Pagani Zonda HP Barchetta

References

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