My Chevrolet Sonic (with a 1.4L turbocharged gasoline engine and a curb weight of around 1.4 US tons or 1.5 metric tons) gets 42-ish MPG (5.6 L/100 km) during the summer and my driving conditions aren't even ideal (half my commute is highway speeds with stoplights). A Toyota Prius (Auris) could probably get more than 50 MPG (less than 4.7 L/100 km) on the same route.
A larger part of fuel consumption is driving behavior. My Ford Fusion (non-hybrid) only gets about 15 mpg in city/rush-hour driving because I drive very aggressively...but nearly 40 mpg on the freeway using cruise control (set to 75-80mph).
