This engine is also one of Ford’s infamous engines. Never designed as a street engine, it was created for racing. Shelby used the 427 in his big block Cobras. This is before the Cobra Jet 428 engine was available.
 | 427 "W" (4V) 1968 | 427 SOHC "D" (8V) 427 SOHC "L"(4V) 1964-68 | 427 "Q" (4V) 1963-64 427 "M" (8V) 1965 427 "R" (8V) 1963-67 427 "W" 1966-67 |
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|---|---|---|---|---|
| Engine Type | 8 cylinder 90 degree, Overhead Valves (OHV) | 8 cylinder 90 degree, Overhead Valves (OHV) | 8 cylinder 90 degree, Overhead Valves (OHV) |
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| Displacement | 427 cu.inches (CID) | 427 cu.inches (CID) | 427 cu.inches (CID) | |
| Maximum torque | 460 lbs./ft. @ 3,200 RPM | 515 lbs./ft. @ 3,800 RPM (4V) 575 lbs./ft. @ 4,200 RPM (8V) | 476 lbs./ft. @ 3,400 RPM (4V) 480 lbs./ft. @ 3,700 RPM (8V) |
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| Maximum Horsepower | 390 BHP @ 5,600 RPM | 616 BHP @ 7,000 RPM (4V) 657 BHP @ 7,500 RPM (8V) | 410 BHP @5,600 RPM (4V) 425 BHP @6,000 RPM (8V) |
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| Firing Order | 1-5-4-2-6-3-7-8 (Number 1 cylinder on right bank, nearest radiator) | 1-5-4-2-6-3-7-8 (Number 1 cylinder on right bank, nearest radiator) | 1-5-4-2-6-3-7-8 (Number 1 cylinder on right bank, nearest radiator) |
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| Bore & Stroke | 4.232" X 3.784" (107.59 mm X 96.03 mm) | 4.232" X 3.784" (107.59 mm X 96.03 mm) | 4.232" X 3.784" (107.59 mm X 96.03 mm) |
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| Compression Ratio | 10.9:1 | 12.01:1 | 11.6:1 (all 1963-64) 10.0:1 (Mercury only) 11.0:1 (most 1965-67) |
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| Oil Pressure (hot) | 35 to 60 lbf/in2 | 35 to 60 lbf/in2 | 35 to 60 lbf/in2 | |
| Mains | cross bolted | cross bolted | cross bolted | |
| Carburetor | Holley 4150 (4V) | Holley 4150-C (4V) Holley 4160 x2 (8V) | Holley 4150 (4V - "Q" series) Holley 4150-C (4V - "W" series) Holley 4160 x2 (8V - "M" & "R" series) all automatic choke | |
| Size of Carburetor | 710 cfm (4V) 780 cfm x2 (8V) | |||
| Fuel | premium gas | super premium | super premium | |
| Intake Manifold | aluminum (thru 12/1968) cast iron after 12/1968 | aluminum | aluminum | |
| Valve train | hydraulic lifters | solid & adjustable lifters | solid & adjustable lifters | |
| Intake | 2.082"-2.097" | 2.235"-2.265" | 2.022"-2.037" (low riser intake before 3/15/1963) 2.082"-2.097" (low riser intake 3/1963-64) 2.185"-2.195" (all medium & hi riser intake) |
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| Exhaust | 1.645"-1.660" | 1.938"-1.968" | 1.645"-1.660" (all low riser intake) 1.723"-1.733" (all medium & hi riser intake) |
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| Distributor | single point vacuum advance | dual point mechanical advance Transistor ignition option: single point mechanical advance | dual point mechanical advance Transistor ignition option: single point mechanical advance |
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| Spark Plugs | Autolite BF-32 | Autolite BF-32 | Autolite BF-32 | |
| Long Block Weight in lbs. | 675 | 680 | 590 (4V-1967) 600 (8V-1967) |
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| Emission Controls | Thermactor | ? | ||
| RPM Rev Limiter | ||||
| 1963 - The 427 was first offered February 1963. The "Q" & "R" 427 engines were offered in Galaxies & Mercurys in 1963. 1964 - The "Q" & "R" engines were offered in 1965 - The Ford Galaxies and the Shelby Cobra got the "R" 1966 - The "R" & "W" engines were used in the 1967 - The "R" & "W" engine was used in the 1968 - The "W" engine was offered as an option in This engine, the infamous 427, was featured as an option on many cars Both cast iron and aluminum heads were offered. The listed weight is The 427 "D" and "L" engines were offered in 1964 |
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