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Isuzu 6VD1 DOHC specs: 3.2L (195 ci) 6-cylinder, 93.4 x 77 mm (3.6772 x 3.0315 in) bore and stroke, 9:1 compression. Rated 190-205 hp, 1992–2004.
The Isuzu 6VD1 DOHC is oversquare — the 3.6772" bore exceeds the 3.0315" stroke by 21.3% — a layout that favors airflow and RPM over leverage at the crank. The 3.0315" stroke does not reach 4,000 ft/min of mean piston speed until about 7,900 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 6 cylinders displaces 32.5 ci (533 cc).
9:1 is low by modern standards and generally happy on regular pump fuel.
It is one of 3 engines in the Isuzu 195ci family, all of them 195 ci — the differences between them are in compression, heads and rating, not displacement. 11 factory variants share these dimensions, rated from 190 to 205 hp across 1992–2004.
| Displacement | 195 ci / 3.2 L |
|---|---|
| Bore | 3.6772" |
| Stroke | 3.0315" |
| Cylinders | 6 |
| Configuration | V6 |
| Compression ratio | 9:1 |
| Bore/stroke ratio | 1.213 |
| Fuel type | gas |
|---|---|
| Advertised HP | 190–205 hp |
| Years | 1992–2004 |
| Year | Version | HP @ rpm | Torque @ rpm | Comp. |
|---|---|---|---|---|
| 1998 | 6VD1 DOHC net | 205 @ 5400 | 214 lb-ft @ 3000 | — |
| 1999 | 6VD1 DOHC net | 205 @ 5400 | 214 lb-ft @ 3000 | — |
| 2000 | 6VD1 DOHC net | 205 @ 5400 | 214 lb-ft @ 3000 | — |
| 2001 | 6VD1 DOHC net | 205 @ 5400 | 214 lb-ft @ 3000 | — |
| 2002 | 6VD1 DOHC net | 205 @ 5400 | 214 lb-ft @ 3000 | — |
| 2003 | 6VD1 DOHC net | 205 @ 5400 | 214 lb-ft @ 3000 | — |
| 2004 | 6VD1 DOHC net | 205 @ 5400 | 214 lb-ft @ 3000 | — |
Factory specification sheet.
| Bore/stroke character | 1.213 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,032 ft/min — conservative for a street engine |
| Displacement per cylinder | 32.5 ci |
| Static compression | 9:1 — low by modern standards, generally happy on regular pump fuel |
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 |
|---|---|---|
| 1992 | — | 6VD1 DOHC |
| 1993 | — | 6VD1 DOHC |
| 1994 | 190 hp | 6VD1 DOHC |
| 1995 | — | 6VD1 DOHC |
| 1998 | 205 hp | 6VD1 DOHC |
| 1999 | 205 hp | 6VD1 DOHC |
| 2000 | 205 hp | 6VD1 DOHC |
| 2001 | 205 hp | 6VD1 DOHC |
| 2002 | 205 hp | 6VD1 DOHC |
| 2003 | 205 hp | 6VD1 DOHC |
| 2004 | 205 hp | 6VD1 DOHC |
2 factory vehicles, 1992–2004. Each year opens that model's engine table.