The XK 140 was introduced in 1954 with major changes in appearance and engineering. Externally, the classic lines were retained but were protected by sturdier bumpers to give better protection, both front and rear. From the rear, the basic lines were remained, but the finish features were completely restyled. Although the external appearance of the XK 140 was significantly altered, the major changes were mechanical. The most important change was the repositioning of the engine three inches forward on the chassis. This not only afforded additional passenger room, it also provided space for the battery in the front fender well, thus freeing the area behind the seats for a jump seat and/or additional storage.