The Spitfire Mk. VIII was going to use the larger Merlin engines so the airframe of the earlier Mk. V had to be redesigned. This kept the new mark from entering service until June 1943. The Mk. VIII was produced in 3 versions; the standard fighter F.VIII with the 1,560 hp Merlin 61; the high altitude fighter HF.VIII with the 1,655hp Merlin 70 and the low altitude fighter LF.VIII with the 1,705 hp Merlin 66. The Mk. VIII was going to be the answer to the Fw-190.