The 2010 Honda Insight is the cheapest hybrid out there and it shows. This car is definitely a compact and bears no resemblance to the 2006 model (It can fit 3 kids or 2 smaller adults, but headroom is tight).
It is powered by a Integrated Motor Assist (IMA) system 1.3-liter VTEC four-cylinder engine with some help during acceleration and recharging of the battery system during coasting and braking. Altogether, the system produces 123 pound-feet of torque and 98 horsepower. A start/stop system turns off the gasoline engine to save fuel at stoplights. Unlike the system in the Toyota Prius or Ford vehicles, the hybrid powertrain in the 2010 Honda Insight can’t start up from a standstill on electric power alone, but it can maintain a 30-mph cruise on just electric power. The 2010 Honda Insight is rated at 40 mpg city, 43 mpg highway.
The expected price of this vehicle is ~ $20,000 and at this price is very affordable and great for younger adults. You can get a EX version with more options like six speaker audio system, stability control, heated exterior mirrors, etc for ~ $22,000.