Lexus RX 450h
The 2011 RX 450h defines design, engineering and luxury innovation in the hybrid luxury crossover segment. As Lexus’ best-selling hybrid model, the RX 450h smoothly moves into 2011 with several new exterior colors after the second generation was introduced in 2010.
The RX 450h offers several new exterior colors to enhance its stylish exterior design. Satin Cashmere Mica replaces Golden Almond Metallic. Black Opal Mica and Stargazer Black have been added to the palette, while Aurora White Pearl, Truffle Mica and Black Sapphire Pearl are discontinued.
The RX 450h’s Lexus Hybrid Drive features a 3.5-liter V6 Atkinson-cycle engine, electric motors, a small and light power-control unit and other fuel-saving innovations. It offers up performance similar to V8s, 295 total system horsepower and better combined fuel economy than the average four-cylinder mid-size sedan. The Front Wheel Drive (FWD) model has EPA-estimated 32 mpg city and 28 mpg highway (30 mpg combined) fuel economy ratings, while the All-Wheel Drive (AWD) model has estimates of 30 mpg city, 28 mpg highway, 29 mpg combined.
As a full hybrid, the RX 450h can operate in electric-only or gas-engine-only modes as well as a mode that combines the power of both. Extended electric-mode operation during low-speed or stop-and-go driving conditions helps reduce fuel consumption. Under certain circumstances, a driver-selectable EV mode can allow the vehicle to be driven short distances using only the electric motors. The RX 450h achieves Super Ultra Low Emission Vehicle (SULEV) certification in California (Tier 2-Bin 3 in other states).
With the Atkinson cycle, the gasoline engine’s intake valves are closed late to delay beginning of compression, resulting in a higher expansion ratio. That reduces intake and exhaust energy losses for more efficient combustion and improved fuel economy. The gas engine alone produces 245 horsepower at 6,000 rpm and 234 lb.-ft. torque at 4,800 rpm. The Atkinson cycle also reduces exhaust temperature.
Source: Lexus press