Land Rover Defender OCTA Engines for Sale | Engine Finders
The Defender OCTA is L663's high-performance derivative, in production since 2024, built on a distinct OCTA chassis and dynamics specification within the broader L663 architecture rather than simply being a higher-trim badge on the standard 90 or 110. It represents Land Rover's most focused performance interpretation of the New Defender platform, and that focus extends to the engine bay - OCTA runs a single, dedicated powertrain rather than the multi-engine choice available across the rest of the New Defender range, a deliberate design decision that mirrors how other manufacturers approach their own flagship performance derivatives. Engine Finders sources verified reconditioned engines matched to this specific engine, though given how new and genuinely niche the model still is, sourcing here looks different to our approach on higher-volume, longer-established engines elsewhere in our range. Where a page like this on an older, well-established platform might confidently quote a firm price range from day one, honesty about a 2024-launch model means acknowledging that market data is still developing, and we'd rather tell you that plainly than manufacture false confidence.
Land Rover Defender OCTA Replacement Engines
OCTA runs a single confirmed engine, unlike the multi-badge approach across the rest of the New Defender range:
- P635 (2024-present) - 4.4L twin-turbo BMW S68 V8 with mild-hybrid assistance. Genuinely BMW-sourced architecture with JLR-specific calibration and mild-hybrid integration layered on top, distinct from both the standard Defender's JLR 5.0L V8 and any casual assumption of shared parts between the two.
The P635 shares its broader BMW engine family with the Range Rover Sport's P530/P615, though calibration, mounting and mild-hybrid integration differ meaningfully between these applications - never assume a component from one will drop straight into another without specialist verification first. This shared heritage is genuinely useful context if you're comparing specialist knowledge across the wider Jaguar Land Rover range, but it should never be mistaken for guaranteed interchangeability between the specific vehicles involved.
Defender OCTA Models & Engine Codes
Unlike the standard Defender range, where trim level meaningfully changes your engine options, OCTA specification is more focused:
- Every genuine Defender OCTA runs the same P635 powertrain, regardless of which specific trim, colour or optional equipment package you've chosen for your particular build.
- This differs from the standard Defender 90, 110 and 130, where D200 through P400e and the separate standard V8 all represent genuinely different engine choices within one body style. OCTA's focused approach reflects its identity as a dedicated performance model rather than a general-purpose variant offering buyer choice across the usual efficiency-to-performance spectrum.
- The single-engine approach simplifies one part of sourcing - there's no badge ambiguity within OCTA itself - but the engine's inherent rarity and BMW-sourced complexity add their own sourcing considerations.
It's worth noting that this single-engine simplicity is itself a genuinely useful fact when you're trying to confirm what your specific vehicle needs - unlike sourcing for the standard 90, 110 or 130, there's no need to cross-reference trim level against a table of possible engine codes. If your vehicle is confirmed as a genuine Defender OCTA, you already know it runs the P635, which removes one whole layer of the uncertainty that applies elsewhere across the New Defender range.
If you're at all uncertain whether your vehicle is genuine OCTA specification versus a standard Defender V8, checking your VIN and vehicle documentation resolves this quickly and reliably before you request any quote from any supplier.
Buy Used and Second-Hand Defender OCTA Engines
Given how new and niche OCTA still is, used-market options are genuinely limited - the model simply hasn't been in service long enough for a mature used-engine market to develop the way it has for longer-established platforms with a decade or more of accumulated ownership history behind them:
- Used - extremely limited availability given the model's youth; we source where genuinely possible rather than promising ready stock.
- Reconditioned - specialist-rebuilt where available, matched to the confirmed P635 specification.
- Rebuilt - a realistic option as more OCTA units enter service and eventually need attention over time.
- Remanufactured - likely to become more commonly requested as the model ages into its typical replacement-engine window.
We'd rather be upfront about this genuine market limitation than imply more availability exists than actually does at this early stage of the model's life - a straightforward, honest answer serves you better than false reassurance about stock levels that don't yet exist, especially on a vehicle representing this significant an investment.
Defender OCTA Engines in Stock
Given OCTA's combination of rarity and BMW-sourced complexity, stock availability and lead times are genuinely different to the rest of our New Defender range - always contact us directly for current availability rather than expecting the same turnaround as our common Ingenium engines, since even confirming a realistic timeline requires checking with our specialist network first. Where we do source a P635 engine, it includes:
- Specialist verification of genuine BMW S68 architecture and JLR-specific calibration
- Mild-hybrid system compatibility confirmed alongside the combustion engine
- Full compatibility checked against your specific OCTA build
- New gaskets, seals and oil pump where a rebuild is undertaken
Every unit is bench-tested before it leaves our network, with the same rigorous standards we apply across our whole range, carefully adapted for this specific engine's genuine BMW-sourced complexity and mild-hybrid integration.
Warranty for Replacement Defender OCTA Engines
All reconditioned and rebuilt Defender OCTA engines we source come with:
- 12-month, unlimited-mileage warranty
- UK-wide supply and fit network
- Bench-test verification before dispatch
Engine Finders is a price comparison marketplace - warranty terms are set by our vetted UK suppliers and confirmed at quote stage. Given OCTA's genuine specialist status, we'd recommend a direct conversation with our team before proceeding rather than expecting the same standardised process as our higher-volume engines - this personal approach reflects the model's current rarity, not any reluctance to help.
