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2006 Toyota Prius

Price Range: $21,725 - $21,725 | MPG: 60 City / 51 Hwy

Standing on the accelerator produces a pleasant surprise. The Prius launches without hesitation thanks to the electric motor's 295 pound-feet of torque from almost a dead standstill. Merging and overtaking at freeways speeds are accomplished with little fuss. Those wishing to experience the car's outer limits, however, should expect more leisurely progress to a top speed of around 100 miles per hour. Speeding calls for horsepower, and as the Prius approaches its maximum velocity, it relies increasingly on its small gasoline engine for motivation. Toyota says the Prius can accelerate from 0-60 mph in about 10 seconds, anemic by modern expectations, but then we've come to expect a lot. As recently as the mid-1950s, legends like the Chrysler 300 and Buick Century didn't reach 60 mph much quicker than that.

Prius gets its power from a gasoline engine supplemented by an electric motor. In a bit of hyperbole, Toyota calls the combination the Hybrid Synergy Drive. Hybrid it is, synergistic it isn't, not by the strictest definition of the word, which would mean that the total power output would be more than the sum of the outputs of the gas and electric motors individually. This is not the case. The Hybrid Synergy Drive does, however, rely on the electric motor even more than the system in the first-generation Prius, which is how Toyota was able to make the Prius larger and more practical without compromising its low emissions or fuel economy. The current model is 30 percent cleaner than the squeaky-clean first-generation (2002-03) Prius. Toyota claims the Prius produces about one-tenth as much pollution as the average new car. Some have described Toyota's hybrid system as an electric motor with gasoline engine assist, and Honda's system as a gasoline engine with electric motor assist.

By complementing the gasoline engine's horsepower with the electric motor's torque, the Prius makes better use of the energy stored in each gallon of gasoline, while leaving fewer nasty chemical compounds in its wake. The electric motor, which begins cranking out its maximum torque virtually the moment it starts spinning, gets the car moving and helps it accelerate while it's underway. The gasoline engine steps to the fore at more constant speeds, especially during highway driving, where horsepower is more critical for maintaining a car's momentum.

The hybrid system improves fuel economy further by turning off the gasoline engine when it's not needed, like when you are waiting at a stop light or even when puttering around town at low speeds. Any time the driver's right foot requests more motivation than the electric motor alone can provide, the gasoline engine fires up and joins in.

The transmission is non-traditional, too. Prius uses an electronically controlled, planetary gear transmission that functions much like a continuously variable transmission. This system constantly and automatically selects the most efficient drive ratio to get the car moving and to keep it moving.

The EPA gives the Prius a City/Highway fuel economy rating of 60/51 mpg with a Combined rating of 55 mpg. These numbers have generated controversy, however. Hybrid-powered cars tend to achieve high ratings on EPA tests because the cars run on rollers, face no wind resistance, and run with the air conditioning shut off. The electric motor plays a bigger role in these laboratory conditions than it does in the real world. In one of those strange twists of logic often produced by law, Toyota is legally barred from advertising any mileage numbers other than those released by the federal government. Most Prius owners report much lower fuel economy, while others argue this point. Pu.