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Toyota GTE Vvti specs: 2.5L (152.3 ci) 6-cylinder, 86 x 71.5 mm (3.3858 x 2.8150 in) bore and stroke, 9:1 compression. Rated 280 hp. DOHC.
The Toyota GTE Vvti is oversquare — the 3.3858" bore exceeds the 2.815" stroke by 20.3% — a layout that favors airflow and RPM over leverage at the crank. The 2.815" stroke does not reach 4,000 ft/min of mean piston speed until about 8,550 RPM, so piston speed is not what limits this engine's revs — valvetrain and breathing are. Each of the 6 cylinders displaces 25.4 ci (416 cc).
9:1 on aluminum heads is low by modern standards and generally happy on regular pump fuel.
It is one of 2 engines in the 1JZ family, all of them 152.3 ci — the differences between them are in compression, heads and rating, not displacement. Factory fitments include the Toyota Chaser, Toyota Cresta, Toyota Mark II and 4 others.
| Displacement | 152.3 ci / 2.5 L |
|---|---|
| Bore | 3.3858" |
| Stroke | 2.815" |
| Cylinders | 6 |
| Compression ratio | 9:1 |
| Bore/stroke ratio | 1.203 |
| Block material | cast iron |
|---|---|
| Head material | aluminum |
| Valvetrain | DOHC |
| Fuel type | gas |
| Advertised HP | 280 hp |
| Bore/stroke character | 1.203 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
|---|---|
| Mean piston speed at 6,000 RPM | 2,815 ft/min — conservative for a street engine |
| Displacement per cylinder | 25.4 ci |
| Static compression | 9:1 — low by modern standards, generally happy on regular pump fuel |
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