Higher power from improved cylinder head.[3][4][5] R-760E-1: 285 hp (213 kW) at 2,100 RPM, 300 hp (224 kW) at 2,250 RPM for takeoff. Higher compression ratio.[3][6][7] R-760E-2: 320 hp (239 kW) at 2,200 RPM, 350 hp (261 kW) at 2,400 RPM for takeoff. Increased supercharging, slightly higher compression ratio.[3][8][9] R-760E-T: 235 hp (175 kW) at 2,000 RPM.