888-244-9105 The C-MAX Hybrid and the C-MAX Energi Plug-In Hybrid offer two distinct choices that maximize style, power and efficiency. The main difference between the C-MAX Hybrid and the C-MAX Energi is the plug-in capability. You have the option of plugging in the C-MAX Energi for a recharge. Both models feature a 2.0L hybrid I-4 powertrain combined with an electric motor, and can operate in electric mode up to 85 mph.