The GS450h was billed by Lexus as the "World's First Luxury Hybrid Performance Sedan." The hybrid powertrain paired a 3.5-liter aluminum V6 gasoline engine with a high-output electric motor to produce 350 horsepower. Performance was good: 0-60 in 5.2 seconds with a top speed of 131 miles per hour. Fuel economy however (25 city, 28 highway) didn't seem to be much of an improvement over a standard Lexus GS350. It seems Lexus decided to use the hybrid powertrain to boost performance, instead of fuel economy.
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