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The third part of the puzzle is the 2013 Lexus GS hybrid models, the GS450h. Because regular beat and F Sport version of the GS350 as the most powerful member of the family sporty new GS, we expected performance sedan. But its a hybrid, right? Is not hybrid cars on fuel economy and feel superior? Sure. But the hybrid electric motor can also be considered as an additional source of power. They can provide performance and economy; it all depends on how you drive. 

Well, in this case, the GS450h probably the most powerful members of the GS lineup, but also the most sporty bunch. GS450h blew himself up the road with the same kind of tranquility as its big brother, the LS460. There incomplete road or engine noise, this luxurious trip, and the seats are soft like butter mashed potatoes. Its a kind of luxury is a trademark Lexus, and its fun, as long as you do not expect a sports sedan. We do not like mouselike control for infotainment system Lexus, but the rest of the interior is a soothing cocoon. Hybrid dress with optional bamboo interior trim, and significantly brighten the cabin. Hold the steering-wheel rim bamboo, and hand you would guess Jaguar, Bentley, something British? 

Start GS450h, and you will see there is no tachometer, power and charging only a speedo next measure. Turn the Drive Mode button for the sport, and measuring the force disappears and turns into a tach, numbers and all. In addition to getting a tachometer, switch to send more water sports for the electric drive motor to increase its role in our velocities tests conducted in sport mode. This system uses two electric motors, one under the hood which mainly handles charging and the other in the rear differential to help drive the wheels; the latter works in concert with the Atkinson-cycle V-6 to produce 338 hp (32 more than the rest of the lineup GS). Only, and port direct-injected V-6 making 286 hp, 20 less than the 3.5-liter V-6 in the GS350. 

Drive it like a Prius, and GS450h handily beats the fuel economy of gas-only GS models. In our hands, it achieves 27 mpg in a mix of highway and city driving. More careful driver should be able to match the EPA fuel economy ratings of 29 mpg city and 34 highway. 

Despite the additional power of the hybrid system, in our tests it was still the slowest member of the new GS lineup, turning in a 0-to-60-mph of 5.7 seconds. The GS350 and GS350 F Sport AWD we have tested slightly faster to 60, at 5.5 and 5.6 seconds. Passing power in hybrid better than gas-only version, however, such as the electric motor provides a boost turbolike after GS450h is up to speed.