Jaguar V12 Engine - 5.3 Litre

5.3 Litre

The 5.3-litre (5,343 cc) version had an oversquare 90 mm (3.5 in) bore and 70 mm (2.8 in) stroke. It produced 210 kW (282 hp), (242 hp (180 kW) to 295 hp (220 kW) depending on emission controls and compression ratio) and 400 N·m (300 lbf·ft) in fuel-injected form. Right from the start of production in 1971 for the Series 3 E-Type, the V12 engine had Lucas OPUS electronic ignition. This system was used until 1982 when the Lucas CEI system was introduced. Initially the OPUS ignition amplifier unit was secured directly to the engine between the cylinder heads and had problems due to overheating. Later cars had the ignition amplifier moved away from the engine where it could get air flow for cooling. Originally the V12 was supposed to get an advanced Fuel Injection system under development by AE Brico but this plan was cancelled at a late stage, possibly due to concerns that the design was too similar to Bosch products. The V12 as used in the Series 3 E-Types, Series 1 XJ12 and early Series 2 XJ12s (1973-April 1975) had four Zenith-Stromberg side draft carburettors. After April 1975, the V12 engine used in the S2 XJ12 and the new XJ-S had a Lucas fuel injection system which was based around the Bosch D-Jetronic system.

This version was used in the following cars:

• Jaguar E-Type
• 1975-1981 Jaguar XJS
• 1972-1981 Jaguar XJ12 (Series 1 and 2)
• 1973-1981 Daimler Double-Six (Series 1 and 2)
• Panther J.72
• Panther De Ville