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Hyundai D6EA specs: 3.0L (183.1 ci) 6-cylinder, 84 x 90 mm (3.3071 x 3.5433 in) bore and stroke, 17.3:1 compression. Rated 240 hp. Rod ratio and piston speed.
The Hyundai D6EA is undersquare — the 3.5433" stroke exceeds the 3.3071" bore by 6.7% — a layout that trades peak RPM for leverage and torque low in the range. The 3.5433" stroke puts mean piston speed at 4,000 ft/min around 6,750 RPM, which is where a production bottom end is generally considered at its limit. Each of the 6 cylinders displaces 30.5 ci (500 cc).
At 17.3:1 this is a compression-ignition engine: the ratio is the heat source that lights the fuel, not a knock limit to be managed.
Factory fitments include the Hyundai Veracruz, Kia Mohave.
| Displacement | 183.1 ci / 3 L |
|---|---|
| Bore | 3.3071" |
| Stroke | 3.5433" |
| Cylinders | 6 |
| Compression ratio | 17.3:1 |
| Bore/stroke ratio | 0.933 |
| Block material | cast iron |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | diesel |
| Advertised HP | 240 hp |
| Bore/stroke character | 0.933 — undersquare — stroke exceeds bore, which favours low-end torque |
|---|---|
| Mean piston speed at 6,000 RPM | 3,543 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 30.5 ci |
| Static compression | 17.3:1 — high enough that pump premium or better is normally required |
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