Lexus LR specs: 88 x 79 mm (3.4646 x 3.1102 in) bore and stroke, shared by all 2 versions. Displacement, compression and factory ratings, plus rod ratio.
| Displacement | 292.9–293 ci |
|---|---|
| Cylinders | 10 |
| Bore | 3.465" |
| Stroke | 3.110" |
| Compression | 12.0:1 |
| Advertised power | 552–553 hp |
| Engine | Displacement | Bore × Stroke | CR | HP |
|---|---|---|---|---|
| LR · 3.465" × 3.110" · 12:1 | 293 ci | 3.4646" × 3.1102" | 12:1 | 552–553 |
| 1LR-GSE | 292.9 ci | 3.4646" × 3.1102" | 12:1 | 552 |
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.