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Honda R18A1 specs: 1.8L (110 ci) 4-cylinder. Rated 140 hp, 2006–2011. Used in the Honda Civic. Rod ratio and piston speed worked out.
Each of the 4 cylinders displaces 27.5 ci (451 cc).
It is one of 3 engines in the Honda 110ci family, all of them 110 ci — the differences between them are in compression, heads and rating, not displacement. 6 factory variants share these dimensions, rated at 140 hp across 2006–2011.
| Displacement | 110 ci / 1.8 L |
|---|---|
| Cylinders | 4 |
| Configuration | I4 |
| Fuel type | gas |
|---|---|
| Advertised HP | 140 hp |
| Years | 2006–2011 |
| Displacement per cylinder | 27.5 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 |
|---|---|---|
| 2006 | 140 hp | R18A1 |
| 2007 | 140 hp | R18A1 |
| 2008 | 140 hp | R18A1 |
| 2009 | 140 hp | R18A1 |
| 2010 | 140 hp | R18A1 |
| 2011 | 140 hp | R18A1 |