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2010 Lexus RX 450h First Impressions

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Luc Gagné
Exactly what the doctor ordered
They're right. This "green" SUV certainly does not lack gusto! The combined power of the gasoline engine and electric motor is rated at 295 horsepower, with 234 pounds-feet of torque to back it up. Those are pretty decent numbers; after all, the RX 350 generates only 275 horsepower. The old RX 400h, meanwhile, produced 268 horsepower and 212 pounds-feet of torque.

The RX 450h isn't motivated by a 4.5-liter engine but rather a 3.5-liter V6.

The new Lexus RX 450h is not only 10-percent more powerful but also 16-percent less thirsty, at least according to the fuel economy average claimed by the manufacturer: 6.8 liters per 100 kilometers. This would translate into a real-world rating of about 8 L/100 km. Not bad at all for a 2-ton SUV.

A full hybrid
Like the Prius and Escape Hybrid, the RX 450h is referred to as a "parallel hybrid" or "full hybrid", meaning that the gasoline engine and electric motor are both independent and complementary. As a result, the vehicle can run solely on electricity if you drive smoothly and are not in a hurry. Whenever extra power is required, a little more pressure on the gas pedal is enough to awaken the V6... unless road conditions previously forced it into action.

The electric motor is fed by a 288-volt, nickel-metal hydride battery (Ni-MH) located under the rear seat. Smaller and lighter than the old model's, the battery frees up space and allows a flat, generously-sized cargo area that's not too high above the ground (unlike the cargo floor of a Nissan Pathfinder, for instance).

Moreover, in keeping with the current trend in the industry, the RX 450h receives an electric power steering. It makes sense for a so-called "green" vehicle to use this type of steering because it further reduces fuel consumption by up to 3 percent (according to Lexus).

Moreover, in keeping with the current trend in the industry, the RX 450h receives an electric power steering.
Luc Gagné
Luc Gagné
Automotive expert
  • More than 30 years of experience as an automotive journalist
  • Over 59 test drives in the past year
  • Attended over 150 new vehicle launches in the presence of the brand's technical specialists