See other engines in this family
Lincoln Windsor 5.0 SEFI specs: 302 ci (5.0L) 8-cylinder, 4.00 x 3.00 in (101.6 x 76.2 mm) bore and stroke, 8.9:1 compression. Rated 150 hp, 1986–1990.
The Lincoln Windsor 5.0 SEFI is oversquare — the 4" bore exceeds the 3" stroke by 33.3% — a layout that favors airflow and RPM over leverage at the crank. The 3" stroke does not reach 4,000 ft/min of mean piston speed until about 8,000 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. A rod ratio of 1.697 is in the range most production engines fall in. Each of the 8 cylinders displaces 37.8 ci (619 cc).
8.9:1 on iron heads is low by modern standards and generally happy on regular pump fuel.
It is one of 9 engines in the Windsor family, the smallest at 302 ci. 5 factory variants share these dimensions, rated at 150 hp across 1986–1990.
| Displacement | 302 ci / 5 L |
|---|---|
| Bore | 4" |
| Stroke | 3" |
| Cylinders | 8 |
| Configuration | V8 |
| Compression ratio | 8.9:1 |
| Rod length | 5.09" |
| Rod ratio | 1.697 |
| Bore/stroke ratio | 1.333 |
| Block material | cast iron |
|---|---|
| Head material | cast iron |
| Valvetrain | OHV |
| Fuel type | gas |
| Advertised HP | 150 hp |
| Years | 1986–1990 |
| Year | Version | HP @ rpm | Torque @ rpm | Comp. |
|---|---|---|---|---|
| 1987 | net | 150 @ 3200 | 270 lb-ft @ 2000 | 8.9:1 |
| 1988 | net | 150 @ 3200 | 270 lb-ft @ 2000 | 8.9:1 |
| 1989 | net | 150 @ 3200 | 270 lb-ft @ 2000 | 8.9:1 |
| 1990 | net | 150 @ 3200 | 270 lb-ft @ 2000 | 8.9:1 |
Factory specification sheet.
| Bore/stroke character | 1.333 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,000 ft/min — conservative for a street engine |
| Rod ratio | 1.697 — moderate — the range most production V8s fall in |
| Displacement per cylinder | 37.8 ci |
| Static compression | 8.9:1 — low by modern standards, generally happy on regular pump fuel |
Each link opens the calculator with this engine's specs already filled in.
These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.
| Year | Advertised HP | Code |
|---|---|---|
| 1986 | 150 hp | Windsor 5.0 SEFI |
| 1987 | 150 hp | Windsor 5.0 SEFI |
| 1988 | 150 hp | Windsor 5.0 SEFI |
| 1989 | 150 hp | Windsor 5.0 SEFI |
| 1990 | 150 hp | Windsor 5.0 SEFI |
1 factory vehicle, 1986–1990. Each year opens that model's engine table.