See other engines in this family
Porsche VW Type 4 1.8 specs: 1.8L (110 ci) 4-cylinder, 93 x 66 mm (3.6614 x 2.5984 in) bore and stroke. Rated 76 hp, 1974–1975. Used in the Porsche 914.
The Porsche VW Type 4 1.8 is oversquare — the 3.6614" bore exceeds the 2.5984" stroke by 40.9% — a layout that favors airflow and RPM over leverage at the crank. The 2.5984" stroke does not reach 4,000 ft/min of mean piston speed until about 9,250 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 4 cylinders displaces 27.5 ci (451 cc).
2 factory variants share these dimensions, rated at 76 hp across 1974–1975.
| Displacement | 110 ci / 1.8 L |
|---|---|
| Bore | 3.6614" |
| Stroke | 2.5984" |
| Cylinders | 4 |
| Compression ratio | 7.3–7.5:1 (published figures vary) |
| Bore/stroke ratio | 1.409 |
| Fuel type | gas |
|---|---|
| Advertised HP | 76 hp |
| Years | 1974–1975 |
| Bore/stroke character | 1.409 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 2,598 ft/min — conservative for a street engine |
| Displacement per cylinder | 27.5 ci |
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 |
|---|---|---|
| 1974 | 76 hp | VW Type 4 1.8 |
| 1975 | 76 hp | VW Type 4 1.8 |
1 factory vehicle, 1974–1975. Each year opens that model's engine table.