At its introduction in 1957 the XK 150 represented a much larger change from the XK 140 than that which accompanied the transition from XK 120 to XK 140. The bodyshell had a completely new appearance, continuing a resemblance to the earlier XKs but more streamlined and subtly modified to widen the passenger compartment as well as having a one-piece curved windscreen. The biggest change in the chassis was introduction of 4-wheel disc brakes, taking advantage of the public's perception of Jaguar as the leader in high performance braking technology after the success of the disc-braked C-type at Le Mans. Under the hood the 3.4 litre engine remained, but now was topped by a freer-breathing B-type cylinder head giving 210 brake horsepower, still with just two SU carburetors.
During 1958 Jaguar introduced the high performance 'S' version with straight port head, 9:1 compression ratio, lightened flywheel and triple 2-inch SU carburetors. Rated at 250 brake horsepower and 240 lb-ft torque the upgrade made the XK 150 even more enjoyable. This 1959 XK 150 Drophead Coupe is finished in traditional Old English White with red leather upholstery, red carpets and a black cloth top. Its engine has been replaced with a 3.5 liter power plant that's been equipped with a "S" specification head (VS1487-9) and triple SU carbs, as an original 150 S would have. The car has received a ground up nut and bolt restoration to exceptional standards of fit, finish and function. In addition to the 'S' spec engine it has been fitted with a 4 speed transmission with overdrive, chrome wire wheels, 16-inch bias ply blackwall tires and comes with a heater, top boot cover, appropriate chrome wire spare wheel, wheel nut mallet, jack and grease gun. Everything has been done to standards appropriate to a high quality concours restoration, a gorgeous car done a few years ago and carefully and consistently maintained since with limited, careful use.
XK 150 Drophead Coupes are exceptionally enjoyable cars with luxurious interior appointments and weather protection that makes them adaptable to driving in a variety of seasons and situations. The 'S'-spec engine and overdrive of this example especially commends itself to driving on long distance tours where it will easily run with modern freeway traffic.
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