If you’ve spent any time up close and personal with Jeep’s massive new Grand Wagoneer SUV, then you won’t be surprised to hear that its fuel economy isn’t what we’d call stellar. It’s huge, heavy, shaped vaguely like a brick and powered by the lovely-but-decidedly-old-school 6. 4-liter Hemi V8, which produces 471 horsepower and 455 pound-feet of torque.
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