{"id":423,"date":"2026-06-04T13:08:06","date_gmt":"2026-06-04T12:08:06","guid":{"rendered":"https:\/\/www.rangeroverenginespecialist.co.uk\/blog\/?p=423"},"modified":"2026-06-04T13:08:07","modified_gmt":"2026-06-04T12:08:07","slug":"range-rover-4-4-petrol-vs-diesel-engine-differences","status":"publish","type":"post","link":"https:\/\/www.rangeroverenginespecialist.co.uk\/blog\/range-rover-4-4-petrol-vs-diesel-engine-differences\/","title":{"rendered":"What Are the Key Differences Between the Range Rover 4.4 Petrol and Diesel Engine Variants?"},"content":{"rendered":"\n

The Range Rover Engine 4.4 is available in two fundamentally different forms \u2014 petrol and diesel \u2014 and understanding the differences between them is essential before you buy a replacement, commission an engine rebuild, or shop for a Range Rover Engine for sale<\/a>. Both variants share the same displacement figure, but they deliver power, torque, and everyday efficiency in completely contrasting ways. At Range Rover Engine Specialist<\/a>, based in Grays, UK, we supply and fit reconditioned petrol and diesel Range Rover Engine 4.4 units across the entire country. Our service comes with No Upfront Charges, No Deposit Required \u2014 you pay only after work completion.<\/p>\n\n\n\n

Engine Codes and Architecture: Petrol vs Diesel Range Rover 4.4<\/strong><\/h2>\n\n\n\n

The first and most important difference is the engine architecture. The 4.4 petrol V8 comes in two generations. The earlier M62B44 \/ 448S2 is a BMW-sourced naturally aspirated V8, used in Range Rovers from 2002 to 2004, producing 286 bhp. Its replacement \u2014 the 448PN (Jaguar AJ41) \u2014 ran from 2004 to 2009, producing 299 bhp and 440 Nm of torque. Both are all-aluminium, 32-valve, dual-overhead-cam units with no forced induction. In contrast, the 4.4 diesel SDV8 (engine code 448DT) is a twin-turbocharged V8 diesel displacing 4,367 cc, producing 339 bhp and a formidable 700 Nm of torque. It uses a completely different block material mix, compression ratio, and fuel delivery system. Consequently, these two 4.4-litre engines share little beyond their displacement.<\/p>\n\n\n\n

Power, Torque and Real-World Performance Differences<\/strong><\/h2>\n\n\n\n

Performance characteristics diverge significantly between petrol and diesel variants of the Range Rover Engine 4.4<\/a>. The 448PN petrol delivers its 299 bhp progressively across a wide rev range, with peak power arriving at around 5,750 rpm. This gives it a smooth, linear throttle response that many drivers prefer for motorway cruising and spirited driving. However, the diesel 448DT SDV8 produces its massive 700 Nm of torque from as low as 2,000 rpm. Therefore, in practical everyday driving \u2014 towing, overtaking, pulling away from junctions \u2014 the diesel feels considerably more muscular. The 448DT completes 0\u201360 mph in approximately 6.9 seconds, compared to around 7.5 seconds for the 448PN petrol. Furthermore, the diesel’s torque advantage makes it the preferred choice for towing loads up to 3,500 kg.<\/p>\n\n\n\n

Full Engine Specs Comparison Table: Range Rover 4.4 Petrol vs Diesel<\/strong><\/h2>\n\n\n\n

The table below provides a comprehensive side-by-side comparison of all major Range Rover 4.4 and related engine variants \u2014 including the Range Rover Engine 3.0 (306DT) for reference. Use this table when deciding which unit to buy, or to identify the correct engine code for a supply and fit or reconditioned JLR engine<\/a> order.<\/p>\n\n\n\n

Engine Variant<\/strong><\/td>Engine Code<\/strong><\/td>Fuel Type<\/strong><\/td>Layout<\/strong><\/td>Power (bhp)<\/strong><\/td>Torque (Nm)<\/strong><\/td>0\u201360 mph<\/strong><\/td>Fuel Economy<\/strong><\/td>CO\u2082 (g\/km)<\/strong><\/td>Towing (kg)<\/strong><\/td>Years<\/strong><\/td>Best For<\/strong><\/td><\/tr>
4.4 V8 Petrol (BMW)<\/td>M62B44 \/ 448S2<\/td>Petrol NA<\/td>V8 32v DOHC<\/td>286 bhp<\/td>440 Nm<\/td>~8.1 sec<\/td>~18 mpg<\/td>~319<\/td>3,000 kg<\/td>2002\u20132004<\/td>Smooth highway cruising<\/td><\/tr>
4.4 V8 Petrol (AJ41)<\/td>448PN<\/td>Petrol NA<\/td>V8 32v DOHC<\/td>299 bhp<\/td>440 Nm<\/td>~7.5 sec<\/td>~19 mpg<\/td>~308<\/td>3,000 kg<\/td>2004\u20132009<\/td>Refined daily driving<\/td><\/tr>
4.4 SDV8 Diesel BEST TORQUE<\/strong><\/td>448DT<\/td>Diesel Twin-Turbo<\/td>V8 Twin-Turbo<\/td>339 bhp<\/td>700 Nm<\/td>~6.9 sec<\/td>~28\u201332 mpg<\/td>~229<\/td>3,500 kg<\/td>2012\u20132021<\/td>Towing, long-distance<\/td><\/tr>
5.0 V8 S\/C Petrol MOST POWER<\/strong><\/td>508PS<\/td>Petrol Supercharged<\/td>V8 S\/C 32v<\/td>510 bhp<\/td>625 Nm<\/td>~5.4 sec<\/td>~18\u201322 mpg<\/td>~295<\/td>3,500 kg<\/td>2009\u2013present<\/td>Performance driving<\/td><\/tr>
3.0 TDV6 \/ SDV6 Diesel<\/td>306DT<\/td>Diesel Turbo<\/td>V6 Turbo<\/td>255\u2013292 bhp<\/td>600 Nm<\/td>~7.4\u20137.9 sec<\/td>~30\u201334 mpg<\/td>~194<\/td>3,500 kg<\/td>2009\u20132020<\/td>Efficiency + economy<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Fuel Economy and Running Costs: A Clear Diesel Advantage<\/strong><\/h2>\n\n\n\n

Fuel economy is one area where the diesel Range Rover Engine 4.4 holds a decisive advantage over its petrol equivalent. The 448DT SDV8 diesel achieves a real-world average of approximately 28 to 32 mpg on mixed and motorway driving, compared to around 18 to 20 mpg for the naturally aspirated 448PN petrol. Over a high annual mileage of 20,000 miles, this difference can represent a saving of \u00a31,500 or more per year in fuel costs alone in the UK. Furthermore, diesel engines typically emit less CO\u2082 per kilometre \u2014 the 448DT produces around 229 g\/km versus approximately 308 g\/km for the 448PN. However, diesel models attract additional servicing costs due to the diesel particulate filter (DPF), EGR valve, and AdBlue system. Consequently, the true running cost advantage of diesel is most evident for drivers covering 15,000 miles or more annually.<\/p>\n\n\n\n

Maintenance Differences: Petrol Simplicity vs Diesel Complexity<\/strong><\/h2>\n\n\n\n

In terms of day-to-day maintenance, the petrol 448PN is the simpler engine to own. It does not require AdBlue fluid top-ups, has no diesel particulate filter to manage, and avoids the EGR valve fouling issues associated with diesel operation. Its most significant maintenance item is timing chain inspection around 100,000 miles. The diesel 448DT SDV8, while highly refined, carries additional service requirements \u2014 including DPF regeneration monitoring, EGR cooler inspection, turbocharger oil feed checks, and AdBlue replenishment every 8,000 to 12,000 miles. Moreover, short urban journeys prevent proper DPF regeneration in the 448DT, leading to progressive filter blockage and potential engine damage over time. For owners who predominantly drive in city traffic, the petrol 448PN or the Range Rover Engine 3.0 (306DT) may prove a lower-maintenance long-term choice.<\/p>\n\n\n\n

Common Faults Compared: What to Expect from Each Engine Code<\/strong><\/h2>\n\n\n\n

Both the petrol and diesel variants of the Range Rover Engine 4.4 have well-documented fault profiles. The 448PN petrol commonly develops timing chain wear after approximately 100,000 miles, along with oil leaks from the camshaft cover gaskets and variable valve timing actuator seals. The earlier M62B44 \/ 448S2 is prone to cooling system failures, including a cracking expansion tank and thermostat failure that can rapidly escalate to head gasket damage. The 448DT diesel SDV8, meanwhile, frequently develops EGR cooler cracks \u2014 causing coolant contamination of the intake \u2014 as well as fuel injector seal weeping and timing chain tensioner wear after 100,000 miles. Additionally, the turbocharger oil feed pipes on the 448DT can become coked and restricted, leading to turbo bearing failure. Understanding these failure patterns helps you make a more informed decision when purchasing a Range Rover Engine for sale or planning a rebuild.<\/p>\n\n\n\n

Range Rover Engine for Sale: Which Unit Should You Buy or Shop For?<\/strong><\/h2>\n\n\n\n

When deciding whether to buy<\/a> a reconditioned Range Rover Engine 4.4 petrol or diesel, the choice ultimately depends on your primary use case. If you regularly tow, cover high annual mileage on A-roads and motorways, or need maximum torque for off-road use, the 448DT diesel SDV8 is the stronger all-round choice. If you prefer a smoother power delivery, simpler maintenance, and predominantly city driving, the 448PN petrol is the more practical option. At Range Rover Engine Specialist in Grays, UK, you can shop<\/a> our full stock of supply and fit packages and reconditioned units for both variants \u2014 including the related Range Rover Engine 3.0 (306DT). Every reconditioned engine is rebuilt to OEM tolerances with new timing components, gaskets, seals, and bearings. No Upfront Charges apply \u2014 you pay only after fitment is completed and road-tested to your satisfaction.<\/p>\n\n\n\n

Logistics: Nationwide Engine Replacement and Vehicle Collection from Grays, UK<\/strong><\/h2>\n\n\n\n

Range Rover Engine Specialist offers a fully managed nationwide logistics service for customers across the UK who require an engine replacement, engine rebuild, or reconditioned engine fitting for any Range Rover 4.4 variant. Our team collects your vehicle directly from your home, workplace, or roadside breakdown location \u2014 regardless of which part of the UK you are in. Your Range Rover is then transported fully insured to our Grays workshop, where our specialist technicians carry out the engine replacement or rebuild. Real-time tracking keeps you informed throughout the process. In most cases, return delivery is included within your all-inclusive supply and fit quote, with no hidden costs. For customers requiring a standalone reconditioned engine despatched to their own garage, we offer fast UK-wide delivery. For full logistics details, visit enginesolutionsltd.co.uk\/logistics<\/a>. No advance payment is required at any stage to get started.<\/p>\n\n\n\n

\"ebay<\/a><\/figure>\n\n\n\n

Frequently Asked Questions<\/strong><\/h2>\n\n\n\n

What is the engine code for the Range Rover 4.4 diesel?<\/h3>\n\n\n\n

The Range Rover 4.4 diesel SDV8 uses engine code 448DT. It is a twin-turbocharged V8 diesel displacing 4,367 cc, producing 339 bhp and 700 Nm of torque. It was fitted to the Range Rover L405 and Range Rover Sport L494 from 2012 to 2021. Always verify this code against your VIN before ordering a reconditioned or replacement engine from Range Rover Engine Specialist.<\/p>\n\n\n\n

Is the Range Rover 4.4 petrol or diesel better for towing?<\/h3>\n\n\n\n

The diesel 448DT SDV8 is the clear choice for towing, producing 700 Nm of torque from just 2,000 rpm and supporting a maximum towing capacity of 3,500 kg. The petrol 448PN produces 440 Nm and supports up to 3,000 kg towing. For any serious towing application, the diesel variant delivers significantly greater low-speed pulling power and stability under load.<\/p>\n\n\n\n

Can I buy a reconditioned Range Rover 4.4 engine with no deposit at Range Rover Engine Specialist?<\/h3>\n\n\n\n

Yes. Range Rover Engine Specialist operates a strict No Upfront Charges, No Deposit Required policy across all services \u2014 including engine replacement, supply and fit, engine rebuild, and reconditioned engine supply. You pay only after the work is fully completed and road-tested to your satisfaction. This applies to all 4.4 petrol and diesel engine variants nationwide.<\/p>\n\n\n\n

What are the most common problems with the Range Rover 4.4 petrol engine (448PN)?<\/h3>\n\n\n\n

The most frequent faults on the 448PN petrol include timing chain wear after 100,000 miles, camshaft cover gasket oil leaks, and variable valve timing actuator seal failure. The earlier M62B44 \/ 448S2 variant additionally suffers from cooling system failures including thermostat faults and expansion tank cracking. Range Rover Engine Specialist resolves all of these issues through our full engine rebuild service.<\/p>\n\n\n\n

Does Range Rover Engine Specialist offer supply and fit nationwide?<\/h3>\n\n\n\n

Yes. We offer full UK-wide vehicle collection, professional engine replacement or engine rebuild at our Grays<\/a> workshop, and insured return delivery. Logistics are fully managed and in most cases included within your supply and fit quotation at no additional charge. For further details on our nationwide coverage, visit enginesolutionsltd.co.uk\/logistics.<\/p>\n","protected":false},"excerpt":{"rendered":"

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