327 AL F5 Performance Engine

The special Factory Five-Roush 327 cu in small block engine is based on the cast iron Ford 302 cu in block with aluminum heads, but it’s much more than that.  This high revving small block engine produces 410 horsepower and 390 ft. lbs of torque!  It is built with cast crank and I-Beam rods, and utilizes a main-cap girdle to ensure bottom-end stability in the 2-bolt main block.  It includes “port-matched” Roush aluminum heads and a hydraulic roller cam. 

The Roush 327 is perfect for almost all applications.  It makes great power across a wide, easy-to-use powerband.  You’ll never need more power on the street and it’ll handle race duty like any Roush motor. 

327ALF5 Horsepower and Torque Graph

327ALF5 Engine Features 
  1. Base Engine:  New Ford Production, 2-bolt main iron block with a main cap girdle, cast crank, I-beam connecting rods with 3/8” high-strength bolts and forged pistons.
  2. Cylinder Heads:  Roush Aluminum “port-matched” with premium stainless steel valves and springs.
  3. Camshaft:  Hydraulic roller camshaft with double roller timing chain.
  4. Valve Train:  1.6:1 roller rocker arms with dual valve springs.
  5. Intake Manifold:  Victor Jr., single plane aluminum.
  6. Carburetor:  Roush “tuned” Holley 770 CFM with vacuum secondaries and electric choke.
  7. Air Cleaner:  14” chrome
  8. Valve Covers:  Polished aluminum covers engraved FACTORY FIVE Powered by Roush.
  9. Oil Pan and Pump:  7 quart, dual sump Canton pan w/adjustable Melling oil pump w/heavy duty oil pump “drive” shaft.
  10. Water Pump:  Reverse rotation w/dual sump oil pan engine.  Standard rotation with front sump applications.
  11. Flywheel:  McLeod SFI-Approved 157 tooth billet steel flywheel balanced and installed.2910.jpg (39756 bytes)
  12. Ignition:  MSD “Billet aluminum”, vacuum advance distributor w/Ford Racing 10mm plug wires and wire loom (8-pc set).
  13. Starter:  Super high-torque1.6kw with cable.
  14. Testing and Documentation:  Each engine is “hot-tested” and Dyno’d to confirm power.  Each engine is shipped with print-out results.
  15. Roush ID Badges:  Each engine is shipped with Roush ID plate and side fender badges “Powered by Roush”.
  16. Warranty:  1 year / 12,000 mile warranty
327ALF5 Engine Technical Information 
  • Engine:                                   327ALF5
  • Horsepower:                          410 hp @ 6,000 RPM
  • Torque:                                  390 ft.lbs.@4,000 RPM
  • Displacement:                         327 cu in
  • Block:                                    8.2” deck, Ford production, 2-bolt main with main cap girdle
  • Crankshaft:                            Nodular iron
  • Crankshaft Stroke:                 3.250”
  • Conn. Rod Type:                   Cast “I-Beam”
  • Compression Ratio:               10:1
  • Pistons:                                  Forged
  • Timing Chain:                         Double Roller
  • Camshaft Info:                       Roush Proprietary
  • Lifter Type:                            Hydraulic Roller
  • Cylinder Heads:                     Aluminum
  • Intake Runner Volume:           215 cc, partial porting
  • Combustion Chamber Vol:     60 cc
  • Valve Sizes:                           2.05” intake, 1.60” exhaust      
  • Rocker Arm Ratio:                1.6:1
  • Spark Plugs:                          Autolite 3923 or equivalent
  • Intake Manifold:                    Edlebrock Victor Jr.
  • Water Pump:                         Standard and reverse rotation
  • Fuel System:                          Holley 770 CFM Carburetor w/vac secondaries & elec choke
  • Fuel Requirements:                 Premium unleaded
  • Max Recommended RPM:     6,000 RPM
  • Firing Order:                          1-3-7-2-6-5-4-8
  • Oil Pump:                               High output, adjustable
  • Timing:                                   31 to 34 degrees @ 4,000 rpm, (not to exceed 35 degrees)
  • Oil Pan:                                  7 quart dual sump canton
  • Oil Filter:                                Motorcraft FL1 or equivalent
  • Oil Weight:                             10W-30 non-synthetic for 1st 3,000 miles.
  • Flywheel:                                Steel, 157 tooth balanced to 28.2 oz
  • Starter:                                   Ford Motorsports Super High Torque 1.6kw or equivalent

Pricing and Orders:

The 327ALF5 engine package costs $9,050 and shipping costs $350 to any destination in the continental U.S.  Call us at 508-291-3443 and place an order, it’s as easy as that.  We’ll give you a ship date and arrange delivery.  You can also order direct from the crew at Roush by logging onto www.Roushperf.com.