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Land Rover AJ133 specs: 5.0L (305 ci) 8-cylinder, 92.5 x 93 mm (3.6417 x 3.6614 in) bore and stroke, 11.5:1 compression. Rated 375 hp, 2010–2013.
The Land Rover AJ133 is close to square: 3.6417" bore against 3.6614" stroke, within 0.5%, which splits the difference between a high-revving layout and a torque layout. The 3.6614" stroke puts mean piston speed at 4,000 ft/min around 6,550 RPM, which is where a production bottom end is generally considered at its limit. Each of the 8 cylinders displaces 38.1 ci (625 cc).
11.5:1 is high for a production gasoline engine; running a ratio like that on pump fuel depends on chamber design and fuel delivery rather than the number alone.
It is one of 2 engines in the Land Rover 305ci family, all of them 305 ci — the differences between them are in compression, heads and rating, not displacement. 4 factory variants share these dimensions, rated at 375 hp across 2010–2013.
| Displacement | 305 ci / 5 L |
|---|---|
| Bore | 3.6417" |
| Stroke | 3.6614" |
| Cylinders | 8 |
| Configuration | V8 |
| Compression ratio | 11.5:1 |
| Bore/stroke ratio | 0.995 |
| Fuel type | gas |
|---|---|
| Advertised HP | 375 hp |
| Years | 2010–2013 |
| Year | Version | HP @ rpm | Torque @ rpm | Comp. |
|---|---|---|---|---|
| 2010 | AJ133 net | 375 @ 6500 | 375 lb-ft @ 3500 | 11.5:1 |
| 2011 | AJ133 net | 375 @ 6500 | 375 lb-ft @ 3500 | 11.5:1 |
| 2012 | AJ133 net | 375 @ 6500 | 375 lb-ft @ 3500 | 11.5:1 |
| 2013 | AJ133 net | 375 @ 6500 | 375 lb-ft @ 3500 | 11.5:1 |
Factory specification sheet.
| Bore/stroke character | 0.995 — square — bore and stroke are within 5%, a balanced compromise |
|---|---|
| Mean piston speed at 6,000 RPM | 3,661 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 38.1 ci |
| Static compression | 11.5:1 — high enough that pump premium or better is normally required |
Each link opens the calculator with this engine's specs already filled in.
These records share identical bore, stroke, displacement and compression. They differ by model year and factory power rating.
| Year | Advertised HP | Code |
|---|---|---|
| 2010 | 375 hp | AJ133 |
| 2011 | 375 hp | AJ133 |
| 2012 | 375 hp | AJ133 |
| 2013 | 375 hp | AJ133 |
2 factory vehicles, 2010–2013. Each year opens that model's engine table.