Ford Authority

Ford 2.5L Duratec 25 Engine (Six-Cylinder)

The Duratec 25, also known as the Mondeo V6, or Mazda GY engine, is a 2.5-liter naturally aspirated six-cylinder from Ford Motor used to power midsize cars, minivans and sport utility vehicles, also known as SUVs. Featuring a dual overhead cam (DOHC) design, in a V configuration, the Ford Duratec 25 V6 engine has been part of the Ford Duratec engine family since 1994.

While this engine first saw usage in North America in the Ford Contour, it also day viewed in the Ford Mondeo for other markets. Ford received help from Porsche and Cosworth for the development of this engine, which shares several mechanical components with the Ford 3.0L Duratec 30 engine. A partnership with Mazda also means this engine was commercialized in Japan under the Mazda GY name, with a derivative called the Mazda K engine, which powered both the Ford Probe and Mazda MX-6 sport coupes. A high performance SVT variant was introduced in 1998, with a final update in 1999 to power the last generation Mercury Cougar. The Ford 2.5L Duratec 25 six-cylinder engine powers the following vehicles:

  • Ford Contour
  • Ford Mondeo
  • Ford Probe
  • Mercury Cougar
  • Mercury Mystique


Engine familyDuratec
Displacement2.5 liters
Configuration & cylindersV configuration, six cylinders
Vehicle engine orientationTransverse
Valve configurationDual-overhead cam (DOHC)
Assembly sitesCleveland, Ohio
PredecessorFord Vulcan
SuccessorFord EcoBoost


Bore82.4 mm
Stroke79.5 mm
Compression ratio10.0:1 / 9.7:1
Max power @ RPM200 hp @ 6,600 rpm
Max torque @ RPM169 lb-ft @ 5,500 rpm
Cylinder headAluminum
Cylinder blockAluminum
Camshaft driveChain

Vehicle Applications

VehicleTransmissionDrive WheelsPower@ RPMTorque (lb-ft) @ RPM
Ford Contour (1995-2000)Five-speed manualFWD170 @ 6,250 165 @ 4,250
Ford Contour SVT (1998)Five-speed manualFWD195 @ 6,600 165 @ 5,500
Ford Contour SVT (1999 - 2000)Five-speed manualFWD200 @ 6,600 169 @ 5,500
Ford Mondeo (1994 - 2000)Five-speed manualFWD170 @ 6,250 165 @ 4,250
Ford Probe (1993 - 1997)Five-speed manual / Four-speed automaticFWD164 @ 5,600 156 @ 4,000
Mercury Cougar (1999 - 2002)Five-speed manualFWD170 @ 6,250 165 @ 4,250
Mercury Mystique (1995-2000)Five-speed manualFWD170 @ 6,250 165 @ 4,250


Discuss the Ford 2.5L Duratec engine in our Ford forum.


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