Bore, stroke, displacement and compression for all 5 Lexus UZ engines, compared side by side. Plus rod ratio and head specs where published.
| Displacement | 242–285 ci |
|---|---|
| Cylinders | 8 |
| Bore | 3.445–3.701" |
| Stroke | 3.248–3.307" |
| Compression | 9.6–10.5:1 |
| Advertised power | 230–300 hp |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| UZ · 3.701" × 3.307" · 9.6:1 | 285 ci | 3.7008" × 3.3071" | 9.6:1 | 230–275 |
| 3UZ-FE | 263 ci | 3.5827" × 3.248" | 10.5:1 | 300 |
| 3UZ-FE | 262 ci | 3.5827" × 3.248" | 10.5:1 | 290 |
| 1UZ-FE | 242 ci | 3.4449" × 3.248" | 10:1 | 250–256 |
| 1UZ-FE (VVT-i) | 242 ci | 3.4449" × 3.248" | 10.5:1 | 290 |
Both bore and stroke vary across the family, so these are separate castings rather than variations on one block.
All are oversquare — bore larger than stroke, which favours revs over low-end torque.
Each engine page carries rod ratio, mean piston speed, bore/stroke character and cylinder head specs where published, and links into the calculators with its dimensions already filled in.