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Winning Makes, Inc.

404 Por La Mar Drive
Santa Barbara CA 93103
Tel: (805) 963-3114
Fax: (805) 966-7129

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Jaguar MkII 3.8 conversion to 4.2
 
The Car:

Jaguar MkII 3.8

Years

1959-1967

Notes

The MK II range was an evolution of the earlier Jaguar 2.4 and 3.4 models. These cars were renamed in retrospect to the MK I 2.4 and 3.4. All engine sizes were fitted with the "B" type cylinder head. The Mk 1 models were in hindsight, somewhat overengineered (because of being the first Jaguar monococque design), and the window frames had been made much thicker than on other Jaguar models built on separate chassis. The Mk II featured a much larger glass area, with separate window frames being substituted for the Mk 1's heavy frames integrated into the door. The front and rear windshiekd were also larger. The interior became much brighter because of the increased glass area, and the dash was redesigned to place the speedometer and tachometer in front of the driver, with the ancilliary instruments and controls placed in the center. This general arrangement was to become a Jaguar "trademark" for the next 12 years, and was only changed with the introduction of the Series II XJ6 in 1973.  

The Mk II became an instant success, and both then and now totally overshadowed the original 2.4 and 3.4 designs. The Mk II featured the same engine sizes, plus the addition of the 3.8 from the XK150. However the Mk II was never fitted (from the factory) with the latters 'S' specification engine with triple carburettors.

The Mk II was also significant as the car which spawned a host of variants during the 1960's from the S-Type of 1963, through the 420 of 1966. Each went upmarket, filling perceived gaps between the compact Jaguars and the MKX  (later renamed as the 420G).

(Note: Where there is more than once model choice, or a modification from the standard model, the specification as installed in this project car is highlighted in red.)

Description

4 door sedan (saloon)

 


3.8 model.

Engines

Model

Engine

Bore/Stroke

Power

2.4

2483cc 6 cyl twin overhead camshaft

83 x 76.5 mm

120 bhp @ 5750 rpm

3.4

3442cc 6 cyl twin overhead camshaft

83 x 106 mm

210 bhp @ 5500 rpm

3.8

3781cc 6 cyl twin overhead camshaft

87 x 106 mm

220 bhp @ 5500 rpm

Project car:
4.2

4235cc 6 cyl twin overhead camshaft

92 x 106 mm

245 bhp @ 5550 rpm

Carburetors

2.4

Twin Solex downdraught

3.4

Twin SU HD6

3.8

Twin SU HD6

Project Car

Twin SU HD8

 

All engines are versions of the Jaguar XK type DOHC inline 6

Brakes

4 wheel discs

Weight

2.4

3192 pounds

3.4

3304 pounds

3.8

3360 pounds

Length

15 feet

Height

4 feet 9 1/2 inches 

Width

5 feet 6 1/2 inches 

Top speed

96/120/125mph 

Wheelbase

107.375 inches

Transmission

4-speed manual. Overdrive optional. Also available, Borg Warner 3 speed automatic. Until September 1965 the manual gearbox was the old design Moss box, and was replaced then with a new all synchomesh box.

Project car: Winning Makes 5-speed

Suspension

Front

Independent. Coil springs, wishbones and anti-roll bar

Rear

Live axle, radius arms, Panhard rod, half elliptic leaf springs.

Standard Equipment

Leather seats, fog/spot lights. Hub caps (standard wheels)
Note: Leather seats were fitted as standard until 1967, the last year of manufacture, when Ambla became standard, with leather still optional to keep base cost down. The fog/spot lights also became optional at this time.