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Honda D-series (2001–2005) specs: 1.7L (101.8 ci) 4-cylinder, 75 x 94.4 mm (2.9528 x 3.7165 in) bore and stroke, 12.5:1 compression. Rated 100 hp, 2001–2005.
The Honda D-series (2001–2005) is undersquare — the 3.7165" stroke exceeds the 2.9528" bore by 20.5% — a layout that trades peak RPM for leverage and torque low in the range. The 3.7165" stroke puts mean piston speed at 4,000 ft/min around 6,450 RPM, which is where a production bottom end is generally considered at its limit. Each of the 4 cylinders displaces 25.5 ci (417 cc).
12.5:1 on aluminum heads is high for a production gasoline engine; running a ratio like that on pump fuel depends on chamber design and fuel delivery rather than the number alone.
It is one of 29 engines in the D-series family, the largest at 101.8 ci. 5 factory variants share these dimensions, rated at 100 hp across 2001–2005.
| Displacement | 101.8 ci / 1.7 L |
|---|---|
| Bore | 2.9528" |
| Stroke | 3.7165" |
| Cylinders | 4 |
| Configuration | I4 |
| Compression ratio | 12.5:1 |
| Bore/stroke ratio | 0.795 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | SOHC |
| Fuel type | gas |
| Advertised HP | 100 hp |
| Years | 2001–2005 |
| Year | Version | HP @ rpm | Torque @ rpm | Comp. |
|---|---|---|---|---|
| 2001 | net | 100 @ 6100 | 98 lb-ft @ 4000 | 12.5:1 |
| 2002 | net | 100 @ 6100 | 98 lb-ft @ 4000 | 12.5:1 |
| 2003 | net | 100 @ 6100 | 98 lb-ft @ 4000 | 12.5:1 |
| 2004 | net | 100 @ 6100 | 98 lb-ft @ 4000 | 12.5:1 |
| 2005 | net | 100 @ 6100 | 98 lb-ft @ 4000 | 12.5:1 |
Factory specification sheet.
| Bore/stroke character | 0.795 — undersquare — stroke exceeds bore, which favours low-end torque |
|---|---|
| Mean piston speed at 6,000 RPM | 3,717 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 25.4 ci |
| Static compression | 12.5:1 — high enough that pump premium or better is normally required |
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 |
|---|---|---|
| 2001 | 100 hp | — |
| 2002 | 100 hp | — |
| 2003 | 100 hp | — |
| 2004 | 100 hp | — |
| 2005 | 100 hp | — |
1 factory vehicle, 2001–2005. Each year opens that model's engine table.