The C-2 competed with the V-22 Osprey for use as the future COD aircraft. Northrop Grumman proposed modernizing the C-2 by installing the same wings, glass cockpit, and engines as the E-2D Advanced Hawkeye. Installing the Rolls Royce T56-427A engines would cut fuel consumption by 13–15% with the same eight-bladed propeller, enabling take-offs with a payload in degree heat and a range in excess of ; similar performance by the C-2A requires engine temperatures at , trading fuel for payload. Adopting the E-2D's cockpit would deliver a 10% savings on lifetime logistical support. One of the Greyhound's most important features is its internal volume of of cargo space. Northrop Grumman stated that their approach could cost far less than the V-22, including saving $120 million from C-2 and E-2D commonality.