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Kia D1.6 CRDi specs: 1.6L (97.56 ci) 4-cylinder, 77 x 84.5 mm (3.0315 x 3.3268 in) bore and stroke, 16:1 compression. Rated 115-136 hp. DOHC.
The Kia D1.6 CRDi is undersquare — the 3.3268" stroke exceeds the 3.0315" bore by 8.9% — a layout that trades peak RPM for leverage and torque low in the range. The 3.3268" stroke does not reach 4,000 ft/min of mean piston speed until about 7,200 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 4 cylinders displaces 24.4 ci (400 cc).
At 16:1 this is a compression-ignition engine: the ratio is the heat source that lights the fuel, not a knock limit to be managed.
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 115 to 136 hp. Factory fitments include the Kia Ceed, Kia Rio, Kia Stonic and 2 others.
| Displacement | 97.56 ci / 1.6 L |
|---|---|
| Bore | 3.0315" |
| Stroke | 3.3268" |
| Cylinders | 4 |
| Compression ratio | 16:1 |
| Bore/stroke ratio | 0.911 |
| Block material | cast iron |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | diesel |
| Advertised HP | 115–136 hp |
| Bore/stroke character | 0.911 — undersquare — stroke exceeds bore, which favours low-end torque |
|---|---|
| Mean piston speed at 6,000 RPM | 3,327 ft/min — conservative for a street engine |
| Displacement per cylinder | 24.4 ci |
| Static compression | 16:1 — high enough that pump premium or better is normally required |
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 |
|---|---|---|
| — | 115 hp | D1.6 CRDi |
| — | 136 hp | D1.6 CRDi |