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Volkswagen 1V specs: 1.6L (98 ci) 4-cylinder, 76.5 x 86.4 mm (3.0118 x 3.4016 in) bore and stroke. Rated 59 hp, 1991–1992. Used in the Volkswagen Jetta.
The Volkswagen 98ci (1V) is undersquare — the 3.4016" stroke exceeds the 3.0118" bore by 11.5% — 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 24.5 ci (401 cc).
It is one of 2 engines in the Volkswagen 98ci family, all of them 98 ci — the differences between them are in compression, heads and rating, not displacement. 2 factory variants share these dimensions, rated at 59 hp across 1991–1992.
| Displacement | 98 ci / 1.6 L |
|---|---|
| Bore | 3.0118" |
| Stroke | 3.4016" |
| Cylinders | 4 |
| Configuration | I4 |
| Bore/stroke ratio | 0.885 |
| Fuel type | diesel |
|---|---|
| Advertised HP | 59 hp |
| Years | 1991–1992 |
| Bore/stroke character | 0.885 — 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 | 24.5 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 |
|---|---|---|
| 1991 | 59 hp | 1V |
| 1992 | 59 hp | 1V |
1 factory vehicle, 1991–1992. Each year opens that model's engine table.