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Land Rover 448DT Engine - Replacement Cost, Problems & CompatibilityProblems & Compatibility
The robust 4.4-litre twin-turbo diesel (TDV8/SDV8) fitted to late-model Discovery 4, Range Rover, and Range Rover Sport vehicles. Reconditioned units start from £6,000 , with 320 UK replacement requests recorded for this engine in 2025 .
Supply & Fit Available
12-Month Warranty
Nationwide Delivery
100+ Suppliers
Used from
£3,500
Reconditioned from
£6,000
Rebuilt from
£8,000
GB
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Key Specs
Land Rover 448DT - Specifications at a Glance
Engine Code
448DT
Fuel
Diesel
Configuration
4.4L V8, twin-turbocharged, common rail
Power Output(s)
306-339 hp (depending on TDV8/SDV8 tune)
Years Produced
2010-2020
UK Models Fitted
3 Land Rover models - full list in Compatibility below
2025 UK Replacement Requests
320
Replaced
Land Rover 368DT
Replaced By
Land Rover 508PS (5.0L SC V8)
Most Common Failure
Oil cooler leaks and coolant crossover pipe degradation
Reconditioned Price Range
£6,000-£9,000 supply-only
Vetted UK specialists for 448DT replacements
Minimum 12-month warranty on reconditioned and rebuilt options
Fitted To
Which Land Rover Models Use the 448DT-
The 448DT was Land Rover’s flagship diesel V8 for a decade, offering a compelling blend of massive low-end torque, refined cruising, and superior towing capacity compared to the smaller V6 alternatives, without the catastrophic bottom-end risks of earlier generations.
| Model | Generation/Chassis | Badge(s) | Years | Link |
|---|---|---|---|---|
 Land Rover Discovery 4 | L319 | 4.4 TDV8 / SDV8 | 2010-2016 | |
| Land Rover Range Rover | L405 | 4.4 TDV8 / SDV8 | 2012-2020 | |
| Land Rover Range Rover Sport | L494 | 4.4 TDV8 / SDV8 | 2013-2017 |
02
Land Rover Range Rover
03
Land Rover Range Rover Sport
CROSS-BRAND
448DT is documented across 3 BMW applications spanning Land Rover Discovery 4, Range Rover, Range Rover Sport. Registration lookup confirms the exact suffix before quotes are sent.
Not sure which engine your car has?
Not sure which engine your car has- Enter your registration above - we'll confirm your exact 448DT fitment before any quotes are sent.
Prices
Land Rover 448DT Engine Replacement Cost (UK)
Condition | Supply Only | Fitted (Independent Specialist) | Typical Warranty |
|---|---|---|---|
Used | £3,500-£6,000 | £4,670-£7,560 | 3-6 months |
Reconditioned | £6,000-£9,000 | £7,170-£10,560 | 12-24 months |
Rebuilt | £8,000-£12,000 | £9,170-£13,560 | 12-24 months |
The primary cost driver for a 448DT engine replacement is the condition of the cooling and lubrication systems. Units with documented replacement of the valley oil cooler gaskets and upgraded aluminium coolant crossover pipes command a slight premium but carry significantly lower long-term risk. Because this is a complex twin-turbo V8, a full 448DT rebuild is more labour-intensive than inline alternatives, though its robust bottom-end design yields a high rebuild success rate. See our full reconditioned engine cost guide for a detailed breakdown of what influences your final quote.
Labour Guide
Fitting a 448DT typically takes 18-24 hours at £65/hr (independent) - confirm exact labour when comparing quotes .
Price Factors
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Common Problems
Land Rover 448DT Engine Problems - What Actually Fails
Every engine has its weak points. Here are the known issues with the 448DT, based on real-world data and verified failure patterns.
Verified issue focus: Oil cooler leaks and coolant crossover pipe degradation.
1. Oil Cooler Leaks (Valley of V8)
1. Oil Cooler Leaks (Valley of V8)
Typical onset:
100k-200k miles
What happens:
The oil cooler is situated in the valley of the V8. Over time, the seals and gaskets degrade due to constant heat cycling, allowing engine oil to leak into the valley. This can lead to severe oil loss, smoke from the engine bay, and in extreme cases, a fire risk if oil contacts hot exhaust components.
Repair vs replace:
Replacing the oil cooler seals is a routine, labour-intensive but highly effective repair. If ignored and oil starvation occurs, catastrophic bearing failure can result, necessitating a full 448DT engine replacement.
Read more about this issue
2. Coolant Crossover Pipe Degradation
2. Coolant Crossover Pipe Degradation
Typical onset:
100k-200k miles
What happens:
The plastic coolant crossover pipes running across the top of the engine become brittle with age and heat. They eventually crack, leading to rapid, often invisible coolant loss and severe engine overheating.
Repair vs replace:
Upgrading to machined aluminium crossover pipes is a standard and highly recommended preventative repair. If overheating has occurred and caused cylinder head warping, a full unit replacement is required.
Read more about this issue
3. Alternator and Accessory Drive Failure
3. Alternator and Accessory Drive Failure
Typical onset:
100k-200k miles
What happens:
The high electrical load combined with the intense heat trapped in the V8 valley causes premature wear on the alternator and associated pulleys.
Repair vs replace:
Alternator replacement is a straightforward and relatively inexpensive repair. It rarely requires engine replacement on its own, but a failing alternator can mask or exacerbate other electrical gremlins in the vehicle.
Read more about this issue
Unlike its predecessor (the 3.6L 368DT), the 448DT has no catastrophic bottom-end design flaw. It is widely considered a durable, highly repairable engine when proactive cooling and oil system maintenance is performed .
Compare rebuilt 448DT prices with the failure already addressed
Engine Variants
How to Confirm You Have the 448DT
The engine code is stamped on a machined pad on the engine block, typically visible on the passenger side near the oil filter housing, or listed on the VIN plate under the bonnet. The 448DT is frequently confused with its predecessor, the Land Rover 368DT (a 3.6L V8 with a known catastrophic crankshaft fracture risk), or its petrol counterpart, the Land Rover 508PS (a 5.0L supercharged V8). Fitting a 368DT or 508PS into a 448DT vehicle requires different ECU mapping, turbo plumbing, and engine mounts, making exact code matching critical to avoid costly installation errors and repeat failures.
Not sure which revision you have- Enter your registration above - we'll confirm your exact 448DT fitment before any quotes are sent.
Easily Confused
Land Rover 368DT
- the 3.6L TDV8 the 448DT replaced, which suffered from known timing chain tensioner and crankshaft fracture risks that the 4.4L architecture largely resolved.
Alternative / Next-Gen Code
Land Rover 508PS
- the 5.0L supercharged V8 that took over the flagship performance role in later models, marking the end of the V8 diesel line for Land Rover.
Related JLR Variants
Land Rover 306DT
- the 3.0L TDV6/SDV6 that served as the more fuel-efficient alternative in the same chassis, though buyers should note it carries its own well-documented crankshaft bearing vulnerabilities.
Confirm the exact 448DT fitment
Not sure which revision you have- Enter your registration above - we'll confirm your exact 448DT fitment before any quotes are sent.
Buying Guide
Buying a Replacement 448DT - What to Choose
Choosing the right replacement route depends on your budget, risk tolerance, and ownership goals. Here's a breakdown of your options.
Used:
A used 448DT is only advisable for lower-value hosts or project builds, and must come with verifiable proof that the oil cooler seals and coolant crossover pipes have been recently replaced. Without this documented history, the risk of inheriting a leaking or overheating engine is unacceptably high. Explore our vetted used 448DT engines
Reconditioned:
A proper reconditioned 448DT directly addresses the core weaknesses of this generation. It will include new oil cooler gaskets, upgraded aluminium coolant crossover pipes, and a thorough flush of the cooling system. This is the most sensible, cost-effective route for preserving a Discovery 4 or Range Rover without the unpredictability of a used unit. Compare reconditioned 448DT options
Rebuilt:
A full rebuild is justified for high-mileage examples showing early signs of wear, or if the engine has already suffered overheating damage. A quality rebuild should include line-boring, new pistons and rings, and a complete overhaul of the valvetrain and turbochargers to exceed factory specifications. Discuss a custom 448DT rebuild
Supply & Fit Line:
Our network of vetted UK Land Rover specialists can supply the unit and handle the complex installation, backing the work with a nationwide warranty so you have a single point of contact for the entire job. View supply and fit options
Vehicle Value Note:
For typical host vehicles like the 2012-2020 Range Rover L405 or Range Rover Sport L494, current market values often sit between £18,000 and £55,000 . With reconditioned replacement costs starting around £6,000, the replacement is generally financially viable ( Safe). However, for late-model Discovery 4 L319 examples where values may dip closer to £10,000, if the lowest viable replacement cost exceeds approximately 60% of the vehicle's current market value, evaluate scrap value before committing.
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Related Engines
Engines Related to the Land Rover 448DT
Explore engines that are closely related to the Land Rover 448DT, including its predecessor, successor, and key family variants.
Predecessor
Land Rover 368DT
- the 3.6L TDV8 the 448DT replaced, which suffered from known timing chain tensioner and crankshaft fracture risks that the 4.4L architecture largely resolved.
Successor
Land Rover 508PS
- the 5.0L supercharged V8 that took over the flagship performance role in later models, marking the end of the V8 diesel line for Land Rover.
Sibling
Land Rover 306DT
- the 3.0L TDV6/SDV6 that served as the more fuel-efficient alternative in the same chassis, though buyers should note it carries its own well-documented crankshaft bearing vulnerabilities.
FAQ
Land Rover 448DTFrequently Asked Questions
Question 1How much does a Land Rover 448DT engine replacement cost-
A reconditioned Land Rover 448DT engine typically starts from £6,000 for supply-only, with fitted costs reflecting the complex V8 installation. Supply-only reconditioned units generally range from £6,000 to £9,000. Independent fitting labour typically adds 18-24 hours at approximately £65/hr. Quotes sourced through our network include a minimum 12-month warranty.
- Supply-only reconditioned units generally range from £6,000 to £9,000 .
- Independent fitting labour typically adds 18-24 hours at approximately £65/hr.
- Quotes sourced through our network include a minimum 12-month warranty.
Question 2What is the most common failure on the 448DT-
The dominant failure patterns on the 448DT are oil cooler leaks in the valley of the V8 and coolant crossover pipe degradation. The oil cooler seals degrade due to constant heat cycling, leading to oil loss and potential fire risks if oil contacts hot exhaust components. Plastic coolant crossover pipes become brittle with age, causing rapid coolant loss and severe overheating. Unlike its predecessor, the 448DT has no catastrophic bottom-end design flaw, making it highly durable when these cooling issues are addressed.
- The oil cooler seals degrade due to constant heat cycling, leading to oil loss and potential fire risks if oil contacts hot exhaust components.
- Plastic coolant crossover pipes become brittle with age, causing rapid coolant loss and severe overheating.
- Unlike its predecessor, the 448DT has no catastrophic bottom-end design flaw, making it highly durable when these cooling issues are addressed.
Question 3Which Land Rover models use the 448DT engine-
The 4.4L 448TD V8 diesel was fitted to the Land Rover Discovery 4 (L319), Range Rover (L405), and Range Rover Sport (L494) between 2010 and 2020. It served as the flagship diesel option, offering massive low-end torque and superior towing capacity compared to the V6 alternatives. It is mechanically distinct from the older 3.6L 368DT and the petrol 5.0L variants. Always verify your specific chassis code before ordering a replacement unit.
- It served as the flagship diesel option, offering massive low-end torque and superior towing capacity compared to the V6 alternatives.
- It is mechanically distinct from the older 3.6L 368DT and the petrol 5.0L variants.
- Always verify your specific chassis code before ordering a replacement unit.
Question 4Should I buy a used or reconditioned 448DT engine-
A reconditioned 448DT is strongly recommended over a used unit to proactively address the known cooling system weaknesses. Used units carry a high risk of inheriting degraded oil cooler seals or brittle coolant crossover pipes. Proper reconditioning upgrades these specific weak points with new gaskets and machined aluminium crossover pipes. Reconditioned units come with a 12 to 24-month warranty, unlike the 3-6 months typical for used engines.
- Used units carry a high risk of inheriting degraded oil cooler seals or brittle coolant crossover pipes.
- Proper reconditioning upgrades these specific weak points with new gaskets and machined aluminium crossover pipes.
- Reconditioned units come with a 12 to 24-month warranty, unlike the 3-6 months typical for used engines.
Question 5How do I know if my car has the 448DT and not the 368DT or 508PS-
You can confirm your engine code by checking the VIN plate under the bonnet or the stamped code on the engine block near the oil filter housing. The 448DT is a 4.4L twin-turbo diesel, visually distinct from the older 3.6L TDV8 and the 5.0L supercharged petrol V8. Fitting the wrong revision will cause severe ECU mapping, turbo plumbing, and engine mount compatibility issues.
- The 448DT is a 4.4L twin-turbo diesel, visually distinct from the older 3.6L TDV8 and the 5.0L supercharged petrol V8.
- Fitting the wrong revision will cause severe ECU mapping, turbo plumbing, and engine mount compatibility issues.
Compare Land Rover 448DT Engine Prices Today
Get a free, no-obligation price comparison tailored to your exact vehicle. Our registration lookup confirms your 448DT fitment before any quotes are sent, ensuring you receive accurate pricing for your specific Discovery 4, Range Rover, or Range Rover Sport chassis. With reconditioned 448DT units starting from £6,000, comparing takes two minutes and could save you four figures on your replacement.
Vetted UK Specialists
Vetted UK specialists for 448DT replacements
Minimum 12-Month Warranty
Minimum 12-month warranty on reconditioned and rebuilt options
Nationwide Delivery
Nationwide delivery plus supply and fit availability
Expert Support
Secure enquiry - no spam. Quotes only from vetted UK engine specialists.
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