What is the fuel consumption of Peugeot 206? Combined fuel consumption varies between 4 l/100 km (59 mpg) and 8.7 l/100 km (27 mpg), depending on the modification. What is the fuel tank capacity of Peugeot 206? Fuel tank capacity of most Peugeot 206 modifications is 50 liters. Some older ones, however, feature 47 or 55-liter fuel tanks. 399 Peugeot 206s have provided 5.2 million miles of real world fuel economy & MPG data. Click here to view all the Peugeot 206s currently participating in our fuel tracking program. 2010. 35.4 Avg MPG. WuhS5aq.