The BlueTec combines a lithium-ion battery pack with a lightweight four-cylinder diesel engine that cranks out 218 horsepower and a water-cooled electric motor that adds another 59 hp to the mix.

Under the hood, an Atkinson Cycle 3.5-liter V6 with a 13:1 compression ratio, some intake tweaks and a high-output, water-cooled electric motor brings output up to 338 horsepower and an ...