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Honda D16B5 specs: 1.6L (97 ci) 4-cylinder, 75 x 90 mm (2.9528 x 3.5433 in) bore and stroke. Built 1998–2000. Used in the Honda Civic. DOHC.
The Honda D16B5 is undersquare — the 3.5433" stroke exceeds the 2.9528" bore by 16.7% — a layout that trades peak RPM for leverage and torque low in the range. The 3.5433" stroke puts mean piston speed at 4,000 ft/min around 6,750 RPM, which is where a production bottom end is generally considered at its limit. Each of the 4 cylinders displaces 24.3 ci (397 cc).
It is one of 19 engines in the D-series family, sitting between the 82 ci and 103.7 ci members. 3 factory variants share these dimensions across 1998–2000.
| Displacement | 97 ci / 1.6 L |
|---|---|
| Bore | 2.9528" |
| Stroke | 3.5433" |
| Cylinders | 4 |
| Configuration | I4 |
| Bore/stroke ratio | 0.833 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Years | 1998–2000 |
| Bore/stroke character | 0.833 — undersquare — stroke exceeds bore, which favours low-end torque |
|---|---|
| Mean piston speed at 6,000 RPM | 3,543 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 24.3 ci |
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These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.
| Year | Advertised HP | Code |
|---|---|---|
| 1998 | — | D16B5 |
| 1999 | — | D16B5 |
| 2000 | — | D16B5 |