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Kia G1.4 T-GDi specs: 1.4L (82.6 ci) 4-cylinder, 71.6 x 84 mm (2.8190 x 3.3070 in) bore and stroke, 10:1 compression. Rated 140 hp. DOHC.
The Kia G1.4 T-GDi is undersquare — the 3.307" stroke exceeds the 2.819" bore by 14.8% — a layout that trades peak RPM for leverage and torque low in the range. The 3.307" 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 4 cylinders displaces 20.7 ci (338 cc).
10:1 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 13 engines in the Smartstream family, sitting between the 61.02 ci and 213.58 ci members. Factory fitments include the Kia Ceed, Kia XCeed.
| Displacement | 82.6 ci / 1.4 L |
|---|---|
| Bore | 2.819" |
| Stroke | 3.307" |
| Cylinders | 4 |
| Compression ratio | 10:1 |
| Bore/stroke ratio | 0.852 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Advertised HP | 140 hp |
| Bore/stroke character | 0.852 — undersquare — stroke exceeds bore, which favours low-end torque |
|---|---|
| Mean piston speed at 6,000 RPM | 3,307 ft/min — conservative for a street engine |
| Displacement per cylinder | 20.6 ci |
| Static compression | 10:1 — in the range that usually runs on pump premium |
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