Like GM, Chrysler is thinking big for its hybrid lineup. The Aspen and Durango Hybrids are both motivated by a 5.7-liter HEMI V-8 engine, which is mated to a two-mode hybrid transmission. Thanks to its low- and high-speed electronically continuously variable transmission and two AC synchronous electric motors, the Aspen can be run at low speed solely on electric power. At higher speeds, the electric motor can be used to assist the combustion engine for acceleration or towing.