Jaguar continued to develop the E-Type throughout its life and the first results of this programme of improvements were introduced in 1964 when the newly enlarged 4.2-litre XK engine was installed.

Maximum power remained unchanged at 265bhp, however torque was usefully increased which, combined with the arrival of a fully synchronised Moss gearbox and more consistent fuel flow from the twin SU petrol pumps, contributed greatly to smooth progress.
 
The Series 2 of 1968 was a further quantum leap with an improved cooling system and better Girling brakes addressing those less than endearing Series I characteristics of getting too hot and not being able to stop.

The Series 2 also introduced several design changes, largely due to US Federal legislation and the most noted exterior features are the open headlights, a larger grille opening, re-positioned and larger front indicators and rear lights below the bumpers.

The 4.2-litre XK straight-six now featured ribbed cam-covers, whilst insid...