The Mark II announced at the end of May 1961 used the same 948 cc engine (engine code 9CG), but with larger twin 1 inch SU carburettors, increasing power to 46.5 bhp. A close-ratio gearbox was fitted. The bodywork was completely revamped, with the headlights migrating to a more conventional position in the wings, either side of a full-width grille and a conventional bonnet. At the rear, styling borrowed from the soon-to-be-announced MGB gave a similarly more modern look, with the added advantages of an opening boot lid and conventional rear bumper bar. The addition of the boot lid required the introduction of squared-off rear wheel arches to retain enough metal in the rear structure to give good rigidity. The result was a much less eccentric-looking sports car, though at the expense of some 100 lbs extra weight. In contrast to the 'frogeye', the later cars are often collectively referred to as square-bodied Sprites by enthusiasts.