Lexus LR 12:1 Specs
Lexus LR · 3.465" × 3.110" · 12:1 engine specs: 293 ci (4.8L), 10-cylinder, 3.4646" bore x 3.1102" stroke, 12:1 compression.
Dimensions
| Displacement | 293 ci / 4.8 L |
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| Bore | 3.4646" |
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| Stroke | 3.1102" |
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| Cylinders | 10 |
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| Compression ratio | 12:1 |
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| Bore/stroke ratio | 1.114 |
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Construction
| Block material | aluminum |
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| Head material | aluminum |
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| Valvetrain | DOHC |
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| Fuel type | gas |
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| Advertised HP | 552–553 hp |
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What these numbers mean
| Bore/stroke character | 1.114 — oversquare — bore exceeds stroke, which favours higher RPM and larger valves |
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| Mean piston speed at 6,000 RPM | 3,110 ft/min — conservative for a street engine |
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| Displacement per cylinder | 29.3 ci |
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| Static compression | 12:1 — high enough that pump premium or better is normally required |
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Variants sharing these dimensions (2)
These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.
| Year | Advertised HP | Code |
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| — | 552 hp | 1LR-G |
| — | 553 hp | 1LR-GUE |
Vehicles (2)
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