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Mazda LF-VE specs: 1.999L (122 ci) 4-cylinder, 87.5 x 83.1 mm (3.4449 x 3.2717 in) bore and stroke. Rated 166-167 hp, 2006–2015. Used in the Mazda MX-5 Miata.
The Mazda LF-VE is oversquare — the 3.4449" bore exceeds the 3.2717" stroke by 5.3% — a layout that favors airflow and RPM over leverage at the crank. The 3.2717" stroke does not reach 4,000 ft/min of mean piston speed until about 7,350 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 4 cylinders displaces 30.5 ci (500 cc).
It is one of 9 engines in the MZR family, the smallest at 122 ci. 10 factory variants share these dimensions, rated from 166 to 167 hp across 2006–2015.
| Displacement | 122 ci / 1.999 L |
|---|---|
| Bore | 3.4449" |
| Stroke | 3.2717" |
| Cylinders | 4 |
| Configuration | I4 |
| Bore/stroke ratio | 1.053 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Advertised HP | 166–167 hp |
| Years | 2006–2015 |
| Bore/stroke character | 1.053 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,272 ft/min — conservative for a street engine |
| Displacement per cylinder | 30.5 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 | — | LF-VE |
| 2007 | 166 hp | LF-VE |
| 2008 | 166 hp | LF-VE |
| 2009 | 167 hp | LF-VE |
| 2010 | 167 hp | LF-VE |
| 2011 | 167 hp | LF-VE |
| 2012 | 167 hp | LF-VE |
| 2013 | 167 hp | LF-VE |
| 2014 | 167 hp | LF-VE |
| 2015 | 167 hp | LF-VE |