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Jaguar XK150 Vintage Racer Project
 
The Car:

Jaguar XK150 Fixed-head coupe

Years:   1957-61
The third and final iteration of the XK range, started with the XK120 in 1948 and continuing with the XK140 in 1954.  By 1957 the XK design was looking a little dated, and Jaguar had set new standards with the introduction of a monococque design  - the Jaguar Mk 1 the previous year.  At the time it did not grab the world's attention in the way that its predecessors had. However, in hindsight it is recognized as the superb car it is, with more refinement than any previous XK.

Although retaining the cut down MK V chassis, as before, the car was updated in appearance by the fitment of a one piece curved windshield, and (on the FHC) curved and larger rear window. The wrap-around window look was "in" at the time. The curvature of the line from front to rear fender was much straightened, resulting in a heavier look, and the roadster model was fitted for the first time with push button external door handles and wind-up windows.  For better drivability, disc brakes were fitted, with servo assist, and soon after introduction, new and more powerful engine options were made available. At launch time only the coupes -  the fixed and drop heads were available, and the introduction of the roadster model was delayed until 1958, when it, and the S models were introduced.

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

Description

 

2 door sports, available in three body styles:

  • Roadster  (from 1958)
  • Drophead
  • Fixed Head Coupe
Specifications
Model Engine Bore/Stroke Power
XK150 3442cc 6 cyl twin overhead camshaft 83 x 106 mm 190 bhp @ 5500 rpm
(base model and very rare)
XK150 
Special Equipment
3442cc 6 cyl twin overhead camshaft 83 x 106 mm 210 bhp @ 5500 rpm
(1957-1961)
XK150 3.8
Special Equipment
3781cc 6 cyl twin overhead camshaft 87 x 106 mm 220 bhp @ 5500 rpm
(1959-1961)
XK150 S 3442cc 6 cyl twin overhead camshaft 83 x 106 mm 250 bhp @ 5500 rpm
(1958-1961)
XK150 3.8 S 3781cc 6 cyl twin overhead camshaft 87 x 106 mm 265 bhp @ 5500 rpm
(1959-1961)
 
Carburetors
XK150 Twin SU HD8 
XK150S Three SU HD8 
Brakes 4 wheel disc with servo assist
Production

Total, all models:  9395
Weight
XK150 Roadster 3192 pounds
XK150 DHC 3220 pounds
XK150 FHC 3248 pounds
Length 14 feet 9 inches
Height 4 feet 6 inches 
Width 5 feet 4 1/2 inches 
Top speed 132 mph (XK150)
134 mph ( XK150 3.8)
136 mph (XK150 3.4S)
138 mph (XK150 3.8S)
Wheelbase 102 inches
Transmission

4-speed manual. Overdrive and 3 speed automatic optional (auto not available on S model)

(Winning Makes conversion on this project to 5-speed manual.)

Suspension
Front Independent. Coil springs, double wishbones and anti-roll bar
Rear Live axle, semi elliptic leaf springs. Telescopic dampers.