Jaguar Mk. X

This car still holds the title as being the broadest British production saloon being 1.93 metres across its rear. It offered independent suspension and power-steering and was half the price of its rivals.

Originally it was fitted with a triple-carburetor 3.8-liter XK motor used in the E-Type, but this changed to a 4.2-liter unit in 1964 that resulted in more torque but with identical power which was enough to push it to 193 km/h even in automatic.

In fact, the auto version was consistently faster than the manual, beating 10 seconds at getting to 96 km/h. This car could achieve this despite being a lavish 5-seater and having an enormous boot as well.

Unfortunately, consumers never really took to this gentle giant causing Jaguar to conduct a mid-term name change when the 4.2-liter was released, to inspire sales.

In 1966 the Mk. X became the 420G which caused a bit of confusion with the S-Type 420. The "G" apparently stood for "Grand", and although its shape was the same it did boast bright metal beading along the cars sides. The grille was different too, with a thick middle strip. The interior had a timber dash rail with lateral-supportive seating.

The final 420G's were assembled in 1970, but it lived on in the big DS420 Daimler Limousine which used a stretch version.