The XK 150 marked the final chapter of Jaguar’s esteemed XK series. While retaining the familiar chassis, the new model showcased refined features like taller front fenders, a wider chrome grille, and a gracefully curved windshield. Notably, all iterations now boasted roll-up door glass.
A significant upgrade arrived in late 1959 when the XK 150 adopted the 3.8-liter inline six-cylinder engine from the Mark IX saloon. Available in standard or “S” configuration, it delivered claimed outputs of 220 or 265 horsepower respectively.
This substantial power increase compensated for the XK 150’s weight gain, enabling a reported top speed exceeding 130 mph and solidifying its position as the swiftest among the early XK models.
Source: RM Sotheby’s