BMW 3 Series 2020 (REVIEW) BMW 3 Series 2020 | 2020 BMW 330i | BMW 3-series Sedan 2020 2020 BMW 320i: Fuel consumption combined*: 6,0 – 5,7 l/100 km, CO2 emissions combined*: 137 – 129 g/km 2020 BMW 330i: Fuel consumption combined*: 6,1 – 5,8 l/100 km, CO2 emissions combined*: 139 – 132 g/km 2020 BMW 318d: Fuel consumption combined*: 4,5 – 4,1 l/100 km, CO2 emissions combined*: 120 – 108 g/km 2020 BMW 320d: Fuel consumption combined*: 4,7 – 4,2 l/100 km, CO2 emissions combined*: 122 – 110 g/km