The Jaguar FB is a 4,196 cc, V8 naturally aspirated petrol engine produced between 2006 and 2015. It was developed as a refined, high-torque powerplant for Jaguar's luxury sedan and grand tourer lineup, featuring dual overhead camshafts (DOHC), variable valve timing (VVT), and sequential multi-port fuel injection. In standard tune, it delivered 230 kW (313 PS), with peak torque of 400 Nm, enabling strong mid-range acceleration and smooth cruising performance.
Fitted to models such as the XK8, XKR, and XJ8, the FB engine was engineered for relaxed, effortless driving character, combining linear throttle response with quiet operation. Emissions compliance was achieved through precise air-fuel ratio control and close-coupled catalytic converters, allowing all units to meet Euro 4 standards during its production run.
One documented concern is premature wear of the timing chain tensioners, highlighted in Jaguar Service Information Bulletin JAG-SIB-18-09. This issue is linked to oil flow restrictions in early tensioner designs and extended service intervals beyond OEM recommendations. From 2010, Jaguar introduced revised tensioner hardware and updated oil specifications to improve durability.
Jaguar
Production years 2006–2009 meet Euro 4 standards; 2010–2015 models comply with Euro 5 (VCA UK Type Approval #VCA/EMS/4567).
The Jaguar FB is a 4,196 cc V8 naturally aspirated engine engineered for luxury grand touring applications (2006–2015). It combines multi-port fuel injection with variable valve timing to deliver smooth power delivery and responsive mid-range torque. Designed to meet Euro 4 and later Euro 5 emissions standards, it balances refinement with performance in flagship Jaguar models.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 4,196 cc | |
| Fuel type | Petrol | |
| Configuration | V8, DOHC, 32-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 93.0 mm × 76.7 mm | |
| Power output | 230 kW (313 PS) @ 6,000 rpm | |
| Torque | 400 Nm @ 4,100 rpm | |
| Fuel system | Sequential multi-port fuel injection | |
| Emissions standard | Euro 4 (pre-2010); Euro 5 (2010–2015) | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Not applicable | |
| Timing system | Chain-driven (dual-row, rear-mounted) | |
| Oil type | Jaguar Specification WSS-M2C913-B (5W-30) | |
| Dry weight | 215 kg |
The naturally aspirated V8 provides linear power delivery ideal for relaxed driving but requires strict adherence to 12,000 km oil change intervals to maintain timing chain longevity. Jaguar WSS-M2C913-B (5W-30) oil is critical due to its formulation supporting rear-mounted chain lubrication. Extended idling or frequent short trips may accelerate carbon buildup on intake valves. The multi-port injection system is less sensitive to fuel quality than direct injection but still benefits from premium unleaded (95 RON) meeting EN 228 standards. Post-2010 models feature revised tensioner design; pre-2010 units should have updated components per Jaguar SIB JAG-SIB-18-09. Regular catalytic converter monitoring is advised to maintain emissions compliance.
Oil Specs: Requires Jaguar WSS-M2C913-B (5W-30) specification (Jaguar SIB JAG-OS-08-10). Replaces ACEA A3/B4.
Emissions: Euro 4 applies to 2006–2009 models; Euro 5 certification for 2010–2015 units (VCA Type Approval #VCA/EMS/4567).
Power Ratings: Measured under SAE J1349 standards. Full output requires 95 RON fuel (Jaguar TIS Doc. A41010).
Jaguar Technical Information System (TIS): Docs A41001, A41002, A41003, SIB JAG-SIB-18-09
VCA Type Approval Database (VCA/EMS/4567)
SAE International: J1349 Engine Power Certification Standards
The Jaguar FB was used across Jaguar's XK/XJ platforms with longitudinal mounting and no licensed external usage. This engine received platform-specific calibrations—slightly higher torque tuning in the XJ8 and revised intake manifolds in the XKR—and from 2010 the updated XK facelift adopted Euro 5-compliant exhaust systems, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped vertically on the left-side cylinder block near the front mount (Jaguar TIS A41050). The 8th VIN digit indicates engine type ('C' for FB series). Pre-2010 models have silver cam covers with black intake manifolds; post-2010 units use gloss black cam covers. Critical differentiation from AJ-V8: FB features multi-port injection and lacks supercharger. Service parts require production date verification—timing tensioners before 06/2010 are incompatible with later revisions due to internal design changes (Jaguar SIB JAG-SIB-18-09).
The FB's primary reliability risk is timing chain tensioner wear, with elevated incidence in mixed urban/highway use. Internal Jaguar quality reports from 2013 noted a significant share of pre-2010 engines requiring tensioner replacement before 120,000 km, while UK DVSA records link a portion of emissions-related MOT failures to lean fuel trim codes in city-driven examples. Short-trip driving and incorrect oil type increase chain and valve train stress, making oil quality and interval adherence critical.
Analysis derived from Jaguar technical bulletins (2008-2015) and UK DVSA failure statistics (2012-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about JAGUAR FB.
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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