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Hyundai G6DB specs: 3.3L (202 ci) 6-cylinder, 92 x 83.8 mm (3.6220 x 3.2992 in) bore and stroke. Rated 234-249 hp, 2006–2010. Used in the Hyundai Sonata.
The Hyundai G6DB is oversquare — the 3.622" bore exceeds the 3.2992" stroke by 9.8% — a layout that favors airflow and RPM over leverage at the crank. The 3.2992" stroke does not reach 4,000 ft/min of mean piston speed until about 7,250 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 6 cylinders displaces 33.7 ci (552 cc).
5 factory variants share these dimensions, rated from 234 to 249 hp across 2006–2010.
| Displacement | 202 ci / 3.3 L |
|---|---|
| Bore | 3.622" |
| Stroke | 3.2992" |
| Cylinders | 6 |
| Configuration | V6 |
| Bore/stroke ratio | 1.098 |
| Fuel type | gas |
|---|---|
| Advertised HP | 234–249 hp |
| Years | 2006–2010 |
| Year | Version | HP @ rpm | Torque @ rpm | Comp. |
|---|---|---|---|---|
| 2008 | G6DB net | 234 | 226 lb-ft | — |
| 2009 | G6DB net | 249 @ 6000 | 229 lb-ft @ 4500 | — |
Factory specification sheet.
| Bore/stroke character | 1.098 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,299 ft/min — conservative for a street engine |
| Displacement per cylinder | 33.7 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 | — | G6DB |
| 2007 | — | G6DB |
| 2008 | 234 hp | G6DB |
| 2009 | 249 hp | G6DB |
| 2010 | — | G6DB |
1 factory vehicle, 2006–2010. Each year opens that model's engine table.