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Honda 91ci (2007–2020) specs: 1.5L (91 ci) 4-cylinder, 73 x 89.4 mm (2.8740 x 3.5197 in) bore and stroke. Rated 109-130 hp, 2007–2020. Used in the Honda Fit.
The Honda 91ci (2007–2020) is undersquare — the 3.5197" stroke exceeds the 2.874" bore by 18.3% — a layout that trades peak RPM for leverage and torque low in the range. The 3.5197" stroke puts mean piston speed at 4,000 ft/min around 6,800 RPM, which is where a production bottom end is generally considered at its limit. Each of the 4 cylinders displaces 22.8 ci (373 cc).
It is one of 2 engines in the Honda 91ci family, all of them 91 ci — the differences between them are in compression, heads and rating, not displacement. 13 factory variants share these dimensions, rated from 109 to 130 hp across 2007–2020.
| Displacement | 91 ci / 1.5 L |
|---|---|
| Bore | 2.874" |
| Stroke | 3.5197" |
| Cylinders | 4 |
| Configuration | I4 |
| Compression ratio | 10.4–11.5:1 (published figures vary) |
| Bore/stroke ratio | 0.817 |
| Fuel type | gas |
|---|---|
| Advertised HP | 109–130 hp |
| Years | 2007–2020 |
| Year | Version | HP @ rpm | Torque @ rpm | Comp. |
|---|---|---|---|---|
| 2007 | net | 109 @ 5800 | 105 lb-ft @ 4800 | 10.4:1 |
| 2008 | net | 109 @ 5800 | 105 lb-ft @ 4800 | 10.4:1 |
| 2009 | net | 117 @ 6600 | 106 lb-ft @ 4800 | 10.4:1 |
| 2010 | net | 117 @ 6600 | 106 lb-ft @ 4800 | 10.4:1 |
| 2011 | net | 117 @ 6600 | 106 lb-ft @ 4800 | 10.4:1 |
| 2012 | net | 117 @ 6600 | 106 lb-ft @ 4800 | 10.4:1 |
| 2013 | net | 117 @ 6600 | 106 lb-ft @ 4800 | 10.4:1 |
| 2015 | net | 130 @ 6600 | 114 lb-ft @ 4600 | 11.5:1 |
| 2016 | net | 130 @ 6600 | 114 lb-ft @ 4600 | 11.5:1 |
| 2017 | net | 130 @ 6600 | 114 lb-ft @ 4600 | 11.5:1 |
| 2018 | net | 130 @ 6600 | 114 lb-ft @ 4600 | 11.5:1 |
| 2020 | net | 130 @ 6600 | 114 lb-ft @ 4600 | 11.5:1 |
Factory specification sheet.
| Bore/stroke character | 0.817 — undersquare — stroke exceeds bore, which favours low-end torque |
|---|---|
| Mean piston speed at 6,000 RPM | 3,520 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 22.8 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 |
|---|---|---|
| 2007 | 109 hp | — |
| 2008 | 109 hp | — |
| 2009 | 117 hp | — |
| 2010 | 117 hp | — |
| 2011 | 117 hp | — |
| 2012 | 117 hp | — |
| 2013 | 117 hp | — |
| 2015 | 130 hp | — |
| 2016 | 130 hp | — |
| 2017 | 130 hp | — |
| 2018 | 130 hp | — |
| 2019 | — | — |
| 2020 | 130 hp | — |
1 factory vehicle, 2007–2020. Each year opens that model's engine table.