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Plymouth Volkswagen EA827 1.7 SOHC specs: 105 ci (1.7L) 4-cylinder, 3.13 x 3.402 in (79.5 x 86.4 mm) bore and stroke, 8.2:1 compression. Rated 70 hp.
The Plymouth Volkswagen EA827 1.7 SOHC is undersquare — the 3.4016" stroke exceeds the 3.1299" bore by 8.0% — a layout that trades peak RPM for leverage and torque low in the range. The 3.4016" stroke does not reach 4,000 ft/min of mean piston speed until about 7,050 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 4 cylinders displaces 26.3 ci (430 cc).
8.2:1 is low by modern standards and generally happy on regular pump fuel.
5 factory variants share these dimensions, rated at 70 hp across 1978–1982.
| Displacement | 105 ci / 1.7 L |
|---|---|
| Bore | 3.1299" |
| Stroke | 3.4016" |
| Cylinders | 4 |
| Configuration | I4 |
| Compression ratio | 8.2:1 |
| Bore/stroke ratio | 0.92 |
| Fuel type | gas |
|---|---|
| Advertised HP | 70 hp |
| Years | 1978–1982 |
| Bore/stroke character | 0.920 — undersquare — stroke exceeds bore, which favours low-end torque |
|---|---|
| Mean piston speed at 6,000 RPM | 3,402 ft/min — conservative for a street engine |
| Displacement per cylinder | 26.3 ci |
| Static compression | 8.2:1 — 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 |
|---|---|---|
| 1978 | 70 hp | Volkswagen EA827 1.7 SOHC |
| 1979 | — | Volkswagen EA827 1.7 SOHC |
| 1980 | — | Volkswagen EA827 1.7 SOHC |
| 1981 | — | Volkswagen EA827 1.7 SOHC |
| 1982 | — | Volkswagen EA827 1.7 SOHC |
1 factory vehicle, 1978–1982. Each year opens that model's engine table.