Toyota's flagship, the Lexus LS, sets a benchmark for soothing luxury motoring, providing a cosseting and isolating environment in a very spacious cabin. Even though the 4.6-liter V8 and first-ever-production eight-speed automatic date back to the car's 2007 introduction, the powertrain remains a paragon of response and smoothness. We measured 21 mpg overall -- impressive for this very large and swift sedan.
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