sentences:  These engines, IF Delta RC 35 inverted V-12s, had a smaller frontal profile than the Piaggio P.VII C.35 radial engines they replaced.Due to the resulting lower aerodynamic drag, the Ca.313 was capable of more speed for the same power.Given the fact that 626 kW (840 hp) Fiat A.38 radial engines were needed for frontline fighters, there was no other choice for this aircraft.