Jaguar XK engine

This article is about the straight-six engine produced by Jaguar Cars from 1948-1992. For the sports car introduced in 1948 powered by this engine, see Jaguar XK120. For the later XK140, see Jaguar XK140. For the XK150, see Jaguar XK150. For the grand touring cars produced by Jaguar from 1996–2014, see Jaguar XK.
Jaguar XK
Overview
ManufacturerJaguar Cars
Production1949–1992
Chronology
SuccessorJaguar AJ6
Jaguar XK engine in a 1955 Jaguar D-Type
XK engine in an XK150
Jaguar XK engine in a Jaguar E-Type
4.2-litre XK in a Jaguar 420

The Jaguar XK is an inline 6-cylinder dual overhead camshaft (DOHC) engine produced by Jaguar Cars between 1949 and 1992. Introduced as a 3.4-litre, it earned fame on both the road and track, being produced in five hemispherical head displacements between 2.4 and 4.2-litres for Jaguar passenger cars, with other sizes being made by Jaguar and privateers for racing. A de-rated version was also used in certain military vehicles built by Alvis and Daimler.