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Engine System - General Information: Specifications

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2006 Jaguar XKR, 2006 Jaguar XK8, 2005 Jaguar XKR, 2005 Jaguar XK8, and 2004 Jaguar XKR. However, it is still accessible from the selected car via links, so may be relevant.
Engine Data

  4.2 Liter 4.2 Liter Supercharged
Engine Capacity  4196 cm3 (256 in3 ) 4196 cm3 (256 in3 )
Engine Description  90° 'Vee' 8 Cylinder 32 Valves 90° 'Vee' 8 Cylinder 32 Valves
Maximum Engine Torque (DIN)  420 Nm/310 lb ft at 4100 RPM 553 Nm/408 lb ft at 3500 RPM
Maximum Engine Power (DIN)  300 BHP/224 kW/304 PS at 6000 RPM 400 BHP/298 kW/406 PS at 6100 RPM
Maximum Engine Torque (EC and SAE)  410.80 Nm/303 lb ft at 4100 RPM 541.40 Nm/399 lb ft at 3500 RPM
Maximum Engine Power (EC and SAE)  293.50 BHP/218.9 kW/298 PS at 6000 RPM 390 BHP/290.80 kW/3953 PS at 6100 RPM
Compression Ratio  11.00 : 1 ± 0.50 : 1 9.10 : 1 ± 0.50 : 1
Bore  86.0 mm (3.386 in) 86.0 mm (3.386 in)
Stroke  90.30 mm (3.555 in) 90.30 mm (3.555 in)
Engine Coolant

Engine VIN Market Coolant Specification Coolant Capacities Liters (US Quarts)
Vehicles built from Vehicles built to Note: 50% water + 50% coolant
2003 Model Year Onwards 
4.2 Liter A30645 A48684 All WSS M97B44-D 9.50 (10.00)
4.2 Liter Supercharged 11.50 (12.10)
Engine Oil

Engine VIN Market Oil Specification Vehicle fitted with oil cooler Liters
Vehicles built from Vehicles built to Initial Fill Service Fill
2003 Model Year Onwards 
4.2 Liter A30645 A48684 NAS API SL and ILSAC GF-3 Yes 8.60 7.00
ROW API SJ/EC and ACEA A1 or A3 Jaguar WSS-M2C913-B preferred
4.2 Liter Supercharged NAS API SL and ILSAC GF-3
ROW API SJ/EC and ACEA A1 or A3 Jaguar WSS-M2C913-B preferred
Firing Order

Vehicles built from 2002.5 Model Year 
GJ0002003Courtesy of JAGUAR CARS, INC.
Front of Engine
Bank 1 Bank 2
Firing Order:
1, 2, 7, 3, 4, 5, 6, 8.
Sealants and Adhesives

Unit Specification
Sealant-Engine Block-to-Bedplate and Sump-to-Bedplate (RTV Silicone) Loctite 5699 Ultra Grey
Sealant-Engine Core Plugs and Block Stub Pipe (Anaerobic Sealant) Loctite 648
Valve Clearances

Cold Engine Inlet Exhaust
Valve Clearance 0.18 - 0.22 mm 0.23 - 0.27 mm
Cylinder Head and Valve Train - Vehicles with 4.2L engine without supercharger

Item Specification
Inlet valves clearances (mm) 0.18 - 0.22
Exhaust valves clearances (mm) 0.23 - 0.27
Valve guide inner diameter (mm) 5.02
Intake valve effective length (mm) 88.87 - 89.17
Exhaust valve effective length (mm) 88.40 - 88.70
Valve stem to guide clearance intake - diametral (mm) 0.012 - 0.067
Valve stem to guide clearance exhaust - diametral (mm) 0.02 - 0.075
Valve head diameter intake (mm) 34.8 - 35.0
Valve head diameter exhaust (mm) 30.8 - 31.0
Intake valve face angle degree 45° 15'
Exhaust valve face angle degree 45° 15'
Valve stem diameter intake (mm) 4.963 - 4.978
Valve stem diameter exhaust (mm) 4.955 - 4.97
Valve spring free length (mm) 45.45 - 46.2
Valve spring installed height (mm) 33.20
Camshaft lobe lift intake (mm) 8.50
Camshaft lobe lift exhaust (mm) 8.50
Camshaft journal to cylinder head bearing surface clearance diametral (mm)
  • Front bearing 0.035 - 0.095
  • Other bearings 0.025 - 0.085
Camshaft journal diameter standard runout limit (mm)
  • Center bearing to outer bearing's 0.07
  • Other bearing to outer bearing's 0.05
Camshaft journal diameter standard out of round (mm) 0.005
Maximum permitted cylinder head warp (mm) 0.125
Cylinder Head and Valve Train - Vehicles with 4.2L engine with supercharger

Item Specification
Inlet valves clearances (mm) 0.18 - 0.22
Exhaust valves clearances (mm) 0.23 - 0.27
Valve guide inner diameter (mm) 5.02
Intake valve effective length (mm) 88.87 - 89.17
Exhaust valve effective length (mm) 88.40 - 88.70
Valve stem to guide clearance intake - diametral (mm) 0.012 - 0.067
Valve stem to guide clearance exhaust - diametral (mm) 0.02 - 0.075
Valve head diameter intake (mm) 34.8 - 35.0
Valve head diameter exhaust (mm) 30.8 - 31.0
Intake valve face angle degree 45° 15'
Exhaust valve face angle degree 45° 15'
Valve stem diameter intake (mm) 4.963 - 4.978
Valve stem diameter exhaust (mm) 4.955 - 4.97
Valve spring free length (mm) 45.45 - 46.2
Valve spring installed height (mm) 33.2
Camshaft lobe lift intake (mm) 9.0
Camshaft lobe lift exhaust (mm) 8.1
Camshaft journal to cylinder head bearing surface clearance diametral (mm)
  • Front bearing 0.035 - 0.095
  • Other bearings 0.025 - 0.085
Camshaft journal diameter standard runout limit (mm)
  • Center bearing to outer bearing's 0.07
  • Other bearing to outer bearing's 0.05
Camshaft journal diameter standard out of round (mm) 0.005
Maximum permitted cylinder head warp (mm) 0.125
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