The release of the Jaguar Mark 1 series in 1955, was one of the most significant events in the company's history is that the 2.4 litres engined version was not only its first-ever monocoque production car to come out of their Coventry plant but also the first to use a short-stroke version of the XK engine.

The Jaguar Mark 1’s shell was developed in close cooperation with the Pressed Steel Company (who not only built the shells but also engineered the structure).

The results met with the approval of the motoring public at large as this was the first "small" new Jaguar of the post-war period.

At launch, it weighed a substantial 900lb (around 400 kilos) less than its contemporary Mk VIIM. Built around a 107.4in. Wheelbase, the Jaguar Mark 1 series four-door saloon was fitted with a 112bhp 2483cc version of the XK engine which was 501b lighter than the 3.4-litre unit.

The engine backed up by two downdraught Solex carburettors in place of the 3.4's SUs.

As was the case with the more substantial Jaguars of the day, a Moss gearbox was standard, and while a Laycock overdrive was optional.

Because disc brakes were still in their infancy, Jaguar opted to fit servo-assisted drum brakes on the Mk1s.

The Jaguar Mark 1 2.8’s front suspension, by coil springs and wishbones, with Burman worm-and-nut steering, was a real innovation, as was rear suspension using cantilever leaf springs, radius arms and a short Panhard rod.

For styling, rather than any other reason, the rear track was 4.5in narrower than the front end, while even narrower than that of the Morris Minor!

While not as lavishly equipped as some of its counterparts in the Jaguar range, the 2.4 did come with an impressive wooden facade dashboard and leather seats.

The basic finished in the Jaguar Mark 1 series was part of the message that these had been designed to fill a sport as entry-level saloons, offering excellent value for money.

Bargain or not, the 2.4 was so obviously underpowered, causing Jaguar to respond with the release of a 3.4-liter engined version of the Mark 1 saloon, welcomed with open arms when it was released in March of 1957.

The Mark 1 3.4 was capable of reaching the top speed of 120mph (around 200 kph).

As far as the external finish was concerned, the updated version came with a slightly wider grille, impressive cutaway rear spats and even more wire wheels, obviously designed to send a message that although entry-level cars were filled a gap in the market, the public still expected a lot more power from their Jaguar.

The Jaguar Mark 1 Series was discontinued in 1959, to be replaced by the Mark 2. During the four years that it was in production, Jaguar sold around 38,000 of these cars, among them, interestingly enough, slightly more 2.4 engined versions than the 3.4 versions.

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