The Lexus GS450h has a short, but proud history as it holds the title of becoming the first mass-production rear-wheel drive luxury hybrid car.

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Since its release in 2006, the GS450h has recently received several updates including an exclusive grill, clear taillamp covers, and 18-inch wheels to set it apart from its strictly gas-powered GS-mates.

Power comes from a combination of sources, including a 3.5 liter V6 used elsewhere in the Lexus range. In this application, it is bolstered by an electric motor. This powertrain is dubbed Lexus Hybrid Drive and is rated at a combined 340 horsepower at 6,400 rpm and 267 lb-ft of torque at 4,800 rpm. The gas engine by itself is rated at 292 hp at 6,400 rpm and the electric motor at 134 kW. This power flows through an electronically controlled Continuously Variable Transmission to the rear wheels.

The GS450h is also a little quicker to 60 mph at 5.2 seconds, compared to the 5.4 seconds of the V8 powered GS460.

Fuel economy is rated at 22 mpg in the city cycle, with the hybrid returning 25 mpg on the highway, as estimated by the EPA. The conventional, gas GS350 returns 19 mpg in the city, and 27 mpg on the highway, respectively, so the hybrid GS450h suffers from the added weight of the hybrid drive system on the open road.

The GS 450h is equipped with the brand's highest level of dynamic handling technology: the Vehicle Dynamics Integrated Management (VDIM) system that goes beyond the capability of other stability and traction-control systems. VDIM is designed to anticipate the onset of a vehicle slide while cornering and then help to automatically correct the situation with a combination of braking, throttle and steering control in a way that is essentially transparent to the driver.

Apart from the hybrid mechanicals and extra computers, the hybrid GS gets more standard features compared to the GS350, which is expected considering the hybrid commands a $10,000 premium. Buyers do get standard 18-inch wheels and tires instead of a 17-inch wheel and tire package, active suspension is standard fare also, and not at all available on the 350, a power rear sunshade is standard as are ventilated front seats, and bigger front brakes. Hybrid buyers also get standard adaptive headlights, high-pressure headlight washers, a back-up camera, parking assist and a rolling code remote as opposed to a rolling code key.

The more noteworthy options include the Lexus Active Power Stabilizer Suspension System with run-flat tires, a radar-enforced Pre-Collision System and dynamic cruise control, different style of 18-inch wheels, a choice of Sirius or XM satellite radios, a voice-activated navigation system and Mark Levinson premium surround sound audio system, among other stand-alone options.