Jaguar XK140

Jaguar XK140
File:Jaguar XK 140, 1954.JPG XK140 open two-seater or roadster 1954
Overview
Manufacturer	Jaguar Cars
Production	1954–1957
Body and chassis
Class	Sports car (S)
Body style	2-seat roadster 2-seat convertible 2-seat coupé
Layout	FR layout
Dimensions
Length	176 in (4,470 mm)
Width	64.5 in (1,638 mm)
Curb weight	3,136–3,248 lb (1,422–1,473 kg)
Chronology
Predecessor	Jaguar XK120
Successor	Jaguar XK150

The Jaguar XK140 is a sports car manufactured by Jaguar between 1954 and 1957 as the successor to the XK120. Upgrades included more interior space, improved brakes, rack and pinion steering, increased suspension travel, and telescopic shock absorbers instead of the older lever arm design.

History

The XK140 was introduced in late 1954 and sold as a 1955 model. Exterior changes that distinguished it from the XK120 included more substantial front and rear bumpers with overriders, and flashing turn signals (operated by a switch on the dash) above the front bumper.

File:Emblem Jagura XK 140.JPG

Boot emblem

The grille remained the same size but became a one-piece cast unit with fewer, and broader, vertical bars. The Jaguar badge was incorporated into the grille surround. A chrome trim strip ran along the centre of the bonnet (hood) and boot (trunk) lid. An emblem on the boot lid contained the words "Winner Le Mans 1951–3".

File:Jaguar XK140(cropped).jpg

Roadster rear

File:Rétromobile 2011 - Jaguar XK 140 - 1956 - 004.jpg

Open two-seater or roadster interior 1956 showing waterproof leather fascia

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Drophead coupé interior

File:LA2 Jaguar XK 140 DHC 1955 rear.jpg

Drophead coupé 1955

File:XK140 SeitLinksHeck.JPG

Fixed head coupé

The interior was made more comfortable for taller drivers by moving the engine, firewall and dash forward to give 3 inches (76 mm) more legroom. Two 6-volt batteries, one in each front wing were fitted to the Fixed Head Coupe, but Drop Heads and the Open Two Seater had a single 12-volt battery. This was installed in the front wing on the passenger side (e.g. In the left wing on right hand drive cars and in the right wing on left hand drive).

The XK140 was powered by the Jaguar XK engine with the Special Equipment modifications from the XK120, which raised the specified power by 10 bhp to 190 bhp (142 kW) gross at 5500 rpm, as standard. The C-Type cylinder head, carried over from the XK120 catalogue, and producing 210 bhp (157 kW) gross at 5750 rpm, was optional equipment.

When fitted with the C-type head, 2-inch sand-cast H8 carburettors, heavier torsion bars and twin exhaust pipes, the car was designated XK140 SE in the UK and XK140 MC in North America.

In 1956 the XK140 became the first Jaguar sports car to be offered with automatic transmission. As with the XK120, wire wheels and dual exhausts were options, and most XK140s imported into the United States had wire wheels. Cars with the standard disc wheels had spats (fender skirts) over the rear wheel opening. When leaving the factory it originally fitted either 6.00 × 16 inch crossply tyres or you could specify 185VR16 Pirelli Cinturato CA67 as a radial option on either 16 × 5K½ solid wheels or 16 × 5K (special equipment) wire wheels.

Body styles

The Roadster (designated OTS - Open Two Seater - in America) had a light canvas top that folded out of sight behind the seats. The interior was trimmed in leather and leatherette, including the dash. Like the XK120 Roadster, the XK140 version had removable canvas and plastic side curtains on light alloy barchetta-type doors, and a tonneau cover. The door tops and scuttle panel were cut back by two inches(50mm) compared to the XK120, to allow a more modern positioning of the steering wheel. The angle of the front face of the doors (A-Post) was changed from 45 degrees to 90 degrees, to make access easier.

The Drophead Coupé (DHC) had a bulkier lined canvas top that lowered onto the body behind the seats, a fixed windscreen integral with the body (the Roadster's screen was removable), wind-up side windows, and a small rear seat. It also had a walnut-veneered dashboard and door cappings.

The Fixed Head Coupé (FHC) shared the DHC's interior trim and rear seat. The prototype Fixed Head Coupe retained the XK120 Fixed Head roof-profile, with the front wings and doors the same as the Drophead. In production, the roof was lengthened with the screen being placed further forward, shorter front wings, and longer doors. This resulted in more interior space, and more legroom.

Engine specifications

XK 140 ENGINES

Model	Years	Displacement	Configuration	Bore/Stroke	Carburettor	Power
XK 140 3.4	1954-1957	3442 cc	DOHC Straight-6	83 mm x 106 mm	Double SU H6	190 bhp (142 kW; 193 PS) @ 5500 rpm
XK 140 3.4 SE (C-Type Head)("MC" in USA)	1954-1957	3442 cc	DOHC Straight-6	83 mm x 106 mm	Double SU H6	210 bhp (157 kW; 213 PS) @ 5750 rpm

Performance

Realistically, a stock XK-140 SE could achieve a top speed of 120–125 mph (193–201 km/h). Road & Track's XK-140 MC test in June 1955 recorded a best two-way average of . Best one-way run was 121.1 mph (194.9 km/h). Sports Cars Illustrated's test of the same model in Aug 1957 had a fastest two-way average of 121 mph (195 km/h). Their best one-way run was 124 mph (200 km/h). Karl Ludvigsen's test published in Sports Car World (July 1957) had the same results as the SCI test.

Acceleration times from 0–60 mph (97 km/h) were 8.4 seconds, 9.1 seconds and 9.1 seconds respectively. Only the R&T test tried 0–100 mph (160 km/h) which took 26.5 seconds. Standing 1/4 mile (~400 m) times were 16.6 seconds (82 mph (132 km/h) approx) and 16.9 seconds (86 mph (138 km/h)).

External links

• XKData.com volunteer maintained online registry with thousands of cars