See other engines in this family
Kia Smartstream specs: 1.6L (97.56 ci) 4-cylinder, 75.6 x 89 mm (2.9764 x 3.5039 in) bore and stroke, 10.5:1 compression. Rated 123-180 hp. DOHC.
The Kia Smartstream is undersquare — the 3.5039" stroke exceeds the 2.9764" bore by 15.1% — a layout that trades peak RPM for leverage and torque low in the range. The 3.5039" stroke puts mean piston speed at 4,000 ft/min around 6,850 RPM, which is where a production bottom end is generally considered at its limit. Each of the 4 cylinders displaces 24.4 ci (400 cc).
10.5:1 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. 2 factory variants share these dimensions, rated from 123 to 180 hp. Factory fitments include the Kia Rio, Kia Seltos, Kia Forte and 4 others.
| Displacement | 97.56 ci / 1.6 L |
|---|---|
| Bore | 2.9764" |
| Stroke | 3.5039" |
| Cylinders | 4 |
| Compression ratio | 10.5:1 |
| Bore/stroke ratio | 0.849 |
| Block material | aluminum |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Advertised HP | 123–180 hp |
| Bore/stroke character | 0.849 — undersquare — stroke exceeds bore, which favours low-end torque |
|---|---|
| Mean piston speed at 6,000 RPM | 3,504 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 24.4 ci |
| Static compression | 10.5:1 — 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 |
|---|---|---|
| — | 123 hp | G1.6 DPi |
| — | 180 hp | G1.6 T-GDi (CVVD) |