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Honda D-series specs: 1.7L (101.8 ci) 4-cylinder, 75 x 94.4 mm (2.9528 x 3.7165 in) bore and stroke, 9.9:1 compression. Rated 117-127 hp.
The Honda D-series 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).
9.9:1 on aluminum heads is in the range that usually runs on pump premium; aluminum sheds heat faster than iron, which makes the same number a little more forgiving.
It is one of 29 engines in the D-series family, the largest at 101.8 ci. 2 factory variants share these dimensions, rated from 117 to 127 hp. Factory fitments include the Honda Civic EX, Honda Civic HX.
| Displacement | 101.8 ci / 1.7 L |
|---|---|
| Bore | 2.9528" |
| Stroke | 3.7165" |
| Cylinders | 4 |
| Compression ratio | 9.9:1 |
| Bore/stroke ratio | 0.795 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | SOHC VTEC |
| Fuel type | gas |
| Firing order | 1-3-4-2 |
| Advertised HP | 117–127 hp |
| Year | Version | HP @ rpm | Torque @ rpm | Comp. |
|---|---|---|---|---|
| 2001 | D17A6 net | 117 @ 6100 | 111 lb-ft @ 4500 | 9.9:1 |
| 2001 | D17A2 net | 127 @ 6300 | 114 lb-ft @ 4800 | 9.9:1 |
| 2002 | D17A6 net | 117 @ 6100 | 111 lb-ft @ 4500 | 9.9:1 |
| 2002 | D17A2 net | 127 @ 6300 | 114 lb-ft @ 4800 | 9.9:1 |
| 2003 | D17A6 net | 117 @ 6100 | 111 lb-ft @ 4500 | 9.9:1 |
| 2003 | D17A2 net | 127 @ 6300 | 114 lb-ft @ 4800 | 9.9:1 |
| 2004 | D17A6 net | 117 @ 6100 | 111 lb-ft @ 4500 | 9.9:1 |
| 2004 | D17A2 net | 127 @ 6300 | 114 lb-ft @ 4800 | 9.9:1 |
| 2005 | D17A6 net | 117 @ 6100 | 111 lb-ft @ 4500 | 9.9:1 |
| 2005 | D17A2 net | 127 @ 6300 | 114 lb-ft @ 4800 | 9.9:1 |
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 | 9.9:1 — in the range that usually runs on pump premium |
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 |
|---|---|---|
| — | 117 hp | D17A6 |
| — | 127 hp | D17A2 |
1 factory vehicle, 2001–2005. Each year opens that model's engine table.