Cosworth DFL Evolution (1981)
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Home » Racing Engines » Cosworth DFL Evolution

Specifications

Introduced in 1981
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Dimensions

Cylinders arrangement: V8 (90o)
Strokes: 4
Bore x Stroke: 90.0 mm x 77.7 mm, 3.543" x 3.059"
Capacity: 3995cc, 241ci
Compression ratio: 12.0:1

Construction materials

Aluminium alloy block with cast iron cylinder liners
Aluminium alloy cylinder-head with hemispherical combustion chambers
forged steel crankshaft with 5 main bearings
Steel connecting rod

Cylinder-head

Dual overhead camshafts (DOHC), gear driven
4 valves / cylinder - 32 valves total

Aspiration

Natural with Lucas multipoint electronic fuel injection

Ignition

Firing order, 1-8-3-6-4-5-2-7

Cooling and lubrication

Water cooled
Dry sump

Models used and Output

Year Model Induction Compression ratio Power Torque
1981 Ford C100 Lucas EFI 12.0:1 540 HP / 403 KW @ 9250 rpm 461 Nm / 340 ft lbs @ 7000 rpm
1982 Mirage M12 Lucas EFI 12.0:1 540 HP / 403 KW @ 9250 rpm 461 Nm / 340 ft lbs @ 7000 rpm
1982 Rondeau M382 Lucas EFI 12.0:1 540 HP / 403 KW @ 9250 rpm 461 Nm / 340 ft lbs @ 7000 rpm
1982 Rondeau M482 Lucas EFI 12.0:1 540 HP / 403 KW @ 9250 rpm 461 Nm / 340 ft lbs @ 7000 rpm
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