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Toyota 5VZ-FE specs: 3.4L (206.1 ci) 6-cylinder, 93.5 x 82 mm (3.6811 x 3.2283 in) bore and stroke, 9.6:1 compression. Rated 190 hp. DOHC.
The Toyota 5VZ-FE is oversquare — the 3.6811" bore exceeds the 3.2283" stroke by 14.0% — a layout that favors airflow and RPM over leverage at the crank. The 3.2283" stroke does not reach 4,000 ft/min of mean piston speed until about 7,450 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 6 cylinders displaces 34.4 ci (563 cc).
9.6:1 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 2 engines in the 5VZ family, all of them 206.1 ci — the differences between them are in compression, heads and rating, not displacement. Factory fitments include the Toyota Tacoma, Toyota 4Runner, Toyota Tundra and 3 others.
| Displacement | 206.1 ci / 3.4 L |
|---|---|
| Bore | 3.6811" |
| Stroke | 3.2283" |
| Cylinders | 6 |
| Compression ratio | 9.6:1 |
| Bore/stroke ratio | 1.14 |
| Block material | cast iron |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Advertised HP | 190 hp |
| Bore/stroke character | 1.140 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 3,228 ft/min — conservative for a street engine |
| Displacement per cylinder | 34.4 ci |
| Static compression | 9.6:1 — in the range that usually runs on pump premium |
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