Under the hood resides a revised version of Toyota's Hybrid Synergy Drive. There's a larger and more powerful gasoline engine now, but instead of providing quicker off-the-line acceleration, it allows more effortless highway cruising. A smaller electric motor contributes less torque to the overall powertrain dance, but it improves efficiency. There are other mechanical changes, too, but the end result is a jump in fuel economy, from last year's EPA-estimated 48 mpg city/45 mpg highway to this year's 51/48 mpg. The latest Prius might even seem like a small, ultra-efficient luxury sedan depending on how you equip it. Luxury-themed items like heated leather seats, a solar-powered sunroof (cools the interior when parked), a navigation system, radar-based adaptive cruise control (matches your speed to the car ahead), a pre-collision system (retracts seatbelts and applies the brakes if a crash is unavoidable) and a lane-departure warning system for inattentive drivers are all available. Also, the automated self-parking system you've seen in Lexus commercials makes its way onto the Prius' options sheet. The Prius has been a huge success, and with such success comes added competition. The all-new Honda Insight looks similar to the Prius, has similar fuel efficiency and costs less, but it's smaller and less sophisticated. The Ford Fusion Hybrid's more traditional body style and more involving driving dynamics should appeal to those who want their hybrid to be a little more like a normal car. The Camry Hybrid is another possibility, as is the limited-availability Altima Hybrid. Regardless, when it comes to an ultra-practical, ultra-efficient automotive choice that, depending on equipment, can be anything from an economy car to a luxury car, the 2010 Toyota Prius cannot be beat.