The Z.1007 was judged better, or at least as satisfactory, than its supposed replacement, the Z.1018, not without reasons: The Z.1007e had three 746 kW (1,000 hp) for a total of 2,237 kW (3,000 hp), 224 kW (300 hp) more than Z.1018. With the Ter version, the power was even higher, with a total maximum of 2,573–2,685 kW (3,450–3,600 hp), almost 746 kW (1,000 hp) more than Z.1018. The maximum speed of Z.1007 (490 km/h/300 mph) was significantly lower due to greater drag, but its 50% greater payload and greater probability of returning home with a damaged engine made it the preferred choice. More importantly, the 746 kW (1,000 hp) engines were reasonably reliable, more so than the 1,044 kW (1,400 hp) class used on the Z.1018.