Another great hybrid vehicle, the Mercury Mariner hybrid again has to do with fuel efficiency, with its 2.4 liter 4 cylinder engine and electric motors gives a combined output of 177 and an average of 31/35 city and highway. The SUV comes with all-wheel drive, which helps increase performance and traction on rough road conditions. The interiors are quite nice and the SUV can comfortably accommodate 6 passengers. Mariner Hybrid offers a cargo space of 66 cubic feet, which is pretty impressive considering the small aspect of the SUV. This incredible SUV hybrid costs about $ 31 billion in the market.