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4.2L Supercharged V8 vs 5.0L Supercharged
The Land Rover 5.0L Supercharged V8 and the Jaguar-Ford 4.2L Supercharged V8 are both powerful engines used in high-performance Land Rover and Jaguar models, but they have distinct differences in power, reliability, and refinement. Here’s how they compare:
Power & Performance
| Engine | Displacement | Horsepower | Torque | 0-60 mph (Range Rover) | Supercharger Type |
|---|---|---|---|---|---|
| 4.2L AJ-V8 SC | 4.2L | 400 hp @ 6,000 rpm | 420 lb-ft @ 3,500 rpm | ~6.5 sec | Eaton M112 |
| 5.0L AJ133 SC | 5.0L | 510 hp @ 6,000 rpm | 461 lb-ft @ 2,500 rpm | ~5.1 sec | Eaton TVS |
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The 5.0L SC is significantly more powerful (+110 hp, +41 lb-ft torque), resulting in much quicker acceleration.
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The 4.2L SC is still strong but lacks the same low-end punch as the 5.0L.
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The 5.0L uses a newer Eaton TVS supercharger, which is more efficient than the older M112 unit on the 4.2L.
Reliability & Issues
| Engine | Common Issues |
|---|---|
| 4.2L SC | Timing chain tensioner wear, water pump failure, supercharger coupler noise, occasional coolant leaks. Generally reliable if maintained. |
| 5.0L SC | Timing chain guide failure, supercharger nose bearing failure, PCV valve leaks, cooling system problems. More prone to catastrophic failures if neglected. |
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The 4.2L SC is generally more durable and has fewer catastrophic issues than the 5.0L SC.
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The 5.0L SC suffers from timing chain guide failures, which can be costly to fix (~$5,000+ if caught early, engine failure if ignored).
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Both engines require premium fuel and regular maintenance to avoid costly repairs.
Fuel Economy
| Engine | City | Highway |
|---|---|---|
| 4.2L SC | ~13 mpg | ~19 mpg |
| 5.0L SC | ~12 mpg | ~18 mpg |
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Neither engine is fuel-efficient, but the 5.0L consumes slightly more fuel due to its higher power output.
Driving Experience
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The 5.0L SC feels more refined, with smoother power delivery and better throttle response.
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The 4.2L SC is a bit more raw, with noticeable supercharger whine and a more mechanical feel.
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The 5.0L’s extra torque at low RPMs makes it better for towing and off-road performance.
Final Verdict
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If you want raw reliability and a classic supercharged V8 feel, the 4.2L SC is the better choice.
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If you want maximum performance and don’t mind higher maintenance costs, the 5.0L SC is superior.
Would you prefer the older, more reliable 4.2L or the more powerful 5.0L in your builds?
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