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Land Rover AJ-V8 supercharged specs: 4.2L (256 ci) 8-cylinder, 86 x 90.3 mm (3.3858 x 3.5551 in) bore and stroke, 9.1:1 compression. Rated 400 hp, 2006–2009.
The Land Rover AJ-V8 supercharged is close to square: 3.3858" bore against 3.5551" stroke, within 4.8%, which splits the difference between a high-revving layout and a torque layout. The 3.5551" stroke puts mean piston speed at 4,000 ft/min around 6,750 RPM, which is where a production bottom end is generally considered at its limit. Each of the 8 cylinders displaces 32.0 ci (524 cc).
9.1:1 is low by modern standards and generally happy on regular pump fuel.
It is one of 2 engines in the Land Rover 256ci family, all of them 256 ci — the differences between them are in compression, heads and rating, not displacement. 4 factory variants share these dimensions, rated at 400 hp across 2006–2009.
| Displacement | 256 ci / 4.2 L |
|---|---|
| Bore | 3.3858" |
| Stroke | 3.5551" |
| Cylinders | 8 |
| Configuration | V8 |
| Compression ratio | 9.1:1 |
| Bore/stroke ratio | 0.952 |
| Fuel type | gas |
|---|---|
| Advertised HP | 400 hp |
| Years | 2006–2009 |
| Bore/stroke character | 0.952 — square — bore and stroke are within 5%, a balanced compromise |
|---|---|
| Mean piston speed at 6,000 RPM | 3,555 ft/min — in the range typical of performance street engines |
| Displacement per cylinder | 32.0 ci |
| Static compression | 9.1:1 — low by modern standards, generally happy on regular pump fuel |
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 |
|---|---|---|
| 2006 | 400 hp | AJ-V8 supercharged |
| 2007 | 400 hp | AJ-V8 supercharged |
| 2008 | 400 hp | AJ-V8 supercharged |
| 2009 | 400 hp | AJ-V8 supercharged |
1 factory vehicle, 2006–2009. Each year opens that model's engine table.