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Kia G6EA specs: 2.7L (164.8 ci) 6-cylinder, 86.7 x 75 mm (3.4134 x 2.9528 in) bore and stroke, 10.4:1 compression. Rated 185-194 hp, 2006–2010.
The Kia G6EA is oversquare — the 3.4134" bore exceeds the 2.9528" stroke by 15.6% — a layout that favors airflow and RPM over leverage at the crank. The 2.9528" stroke does not reach 4,000 ft/min of mean piston speed until about 8,150 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 6 cylinders displaces 27.5 ci (450 cc).
10.4:1 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 2 engines in the Kia 165ci family, all of them 164.8 ci — the differences between them are in compression, heads and rating, not displacement. 5 factory variants share these dimensions, rated from 185 to 194 hp across 2006–2010.
| Displacement | 164.8 ci / 2.7 L |
|---|---|
| Bore | 3.4134" |
| Stroke | 2.9528" |
| Cylinders | 6 |
| Configuration | V6 |
| Compression ratio | 10.4:1 * |
| Bore/stroke ratio | 1.156 |
* Compression ratio from a single source; not yet cross-verified.
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Advertised HP | 185–194 hp |
| Years | 2006–2010 |
| Year | Version | HP @ rpm | Torque @ rpm | Comp. |
|---|---|---|---|---|
| 2007 | G6EA net | 185 @ 6000 | 182 lb-ft @ 4000 | — |
| 2008 | G6EA net | 185 @ 6000 | 182 lb-ft @ 4000 | — |
| 2009 | G6EA net | 194 @ 6000 | 184 lb-ft @ 4500 | — |
| 2010 | G6EA net | 194 | 184 lb-ft | — |
Factory specification sheet.
| Bore/stroke character | 1.156 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 2,953 ft/min — conservative for a street engine |
| Displacement per cylinder | 27.5 ci |
| Static compression | 10.4:1 — 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 |
|---|---|---|
| 2006 | 185 hp | G6EA |
| 2007 | 185 hp | G6EA |
| 2008 | 185 hp | G6EA |
| 2009 | 194 hp | G6EA |
| 2010 | 194 hp | G6EA |
1 factory vehicle, 2006–2010. Each year opens that model's engine table.