Ford 240ci 9.2:1 Specs
Ford Ford 240ci · 4" × 3.18" · 9.2:1 engine specs: 240 ci (3.9L), 6-cylinder, 4" bore x 3.18" stroke, 9.2:1 compression.
Dimensions
| Displacement | 240 ci / 3.9 L |
|---|
| Bore | 4" |
|---|
| Stroke | 3.18" |
|---|
| Cylinders | 6 |
|---|
| Compression ratio | 9.2:1 |
|---|
| Rod length | 6.795" |
|---|
| Rod ratio | 2.137 |
|---|
| Bore/stroke ratio | 1.258 |
|---|
| Piston deck clearance | 0.0018" |
|---|
Construction
| Induction | 1-1 |
|---|
| Advertised HP | 150 hp |
|---|
| Years | 1965–1969 |
|---|
What these numbers mean
| Bore/stroke character | 1.258 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|
| Mean piston speed at 6,000 RPM | 3,180 ft/min — conservative for a street engine |
|---|
| Rod ratio | 2.137 — long — less side loading on the cylinder wall, favours high RPM |
|---|
| Displacement per cylinder | 40.0 ci |
|---|
| Static compression | 9.2:1 — low by modern standards, generally happy on regular pump fuel |
|---|
Cylinder head
| Intake valve diameter | 1.787" |
|---|
| Exhaust valve diameter | 1.566" |
|---|
| Chamber volume | 66 cc |
|---|
| Rocker ratio | 1.61:1 |
|---|
| Lifter type | hydraulic |
|---|
Run the numbers for this engine
Each link opens the calculator with this engine's specs already filled in.
Variants sharing these dimensions (3)
These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.
| Year | Advertised HP | Code |
|---|
| 1965 | 150 hp | — |
| 1968 | 150 hp | — |
| 1969 | 150 hp | — |
Similar engines
Source: NHRA blueprints — nhra.net blueprints
← All Ford 240ci engines