Toyota unveils 2010 Prius hybrid

Following months of conjecture and a number of leaks, Toyota has finally unveiled its all-new 2010 Prius hybrid. Using the 2009 Detroit Auto Show as a launching pad, the third-generation Prius is scheduled to simultaneously hit showrooms in the U.S. and Japan by late spring and will filter across to other markets soon after.

The 2010 Prius will offer even better mileage ratings and performance than the current model, while also being quieter, roomier, and equipped with more features. Some of these include an available moonroof with solar panels, four driving modes, Intelligent Parking Assist (IPA) and steering wheel touch controls that display on the instrument panel.

The first-generation Prius, which was EPA rated at 41mpg for the combined cycle, was replaced by the current model, which is EPA rated at 46mpg for the combined cycle. Using a combination of new technologies, fuel efficiency was increased to an estimated 50mpg for the new Prius.

Sharing a similar body to the current model, engineers have meticulously tested and modified every surface of the car’s exterior to come up with a drag-coefficient of just 0.25Cd – one of the lowest ratings for a production vehicle today. The overall height of the Prius is the same as the current model, but the roof profile is altered by moving the top of the roof 3.9in to the rear. This emphasizes the wedge shape, and also allows for enhanced rear headroom and improved aerodynamics. Dimensionally, the new Prius has the same wheelbase as the current generation. Overall length is slightly increased by 0.6in, in part by moving the front cowl forward.

Power comes from a larger and more powerful 1.8L Atkinson-cycle four-cylinder engine, combined with the latest iteration of Toyota’s Synergy Drive hybrid system. Contrary to conventional wisdom, the larger engine actually helps improve highway mileage. By making more torque, the new engine can run at lower average rpm on the highway. When operating at lower rpm, the new engine uses less fuel. Mileage is especially improved in cold-start conditions and at higher speeds.

The engine develops a peak output of 98hp and 105lb-ft of torque, while the electric motor is rated at 80hp and 153lb-ft of torque. This is enough to send the car from 0-60mph in 9.8 seconds.

Use of an electric water pump and a new exhaust gas recirculation (EGR) system also contribute to the engine’s efficiency. The 1.8L Prius engine is the first Toyota power plant that requires no belts under the hood for better fuel economy and less potential maintenance.

A multi-information display panel that monitors fuel and energy consumption is standard. It provides feedback on the Prius’ efficiency using three different displays to help the driver acquire economical driving habits.

The available driving modes include engine alone, battery alone, or a combination of both. While these modes will depend on the amount of power demanded, the driver can also control how efficiently they want to drive with a choice of three different selectable driving modes. EV-Drive Mode allows driving on battery power alone at low speeds for about a mile, if conditions permit. There is also a Power Mode, which increases sensitivity to throttle input for a sportier feel, and an Eco Mode, which helps the driver achieve their best mileage.

Gallery: 2010 Toyota Prius