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Genesis G6DP specs: 3.3L (204.3 ci) 6-cylinder, 92 x 83.8 mm (3.6220 x 3.2992 in) bore and stroke, 11.5:1 compression. Rated 282 hp. DOHC.
The Genesis G6DP 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 34.1 ci (558 cc).
11.5:1 on aluminum heads is high for a production gasoline engine; running a ratio like that on pump fuel depends on chamber design and fuel delivery rather than the number alone.
It is one of 2 engines in the Lambda II family, all of them 204.3 ci — the differences between them are in compression, heads and rating, not displacement. Factory fitments include the Genesis G80, Genesis G70, Genesis GV70.
| Displacement | 204.3 ci / 3.3 L |
|---|---|
| Bore | 3.622" |
| Stroke | 3.2992" |
| Cylinders | 6 |
| Compression ratio | 11.5:1 |
| Bore/stroke ratio | 1.098 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Advertised HP | 282 hp |
| 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 | 34.1 ci |
| Static compression | 11.5:1 — high enough that pump premium or better is normally required |
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