The official fuel consumption figures for the BMW E90 320i are approximately 34 mpg (urban), 53 mpg (extra urban), and 44 mpg (combined) based on manufacturer data for models with manual transmission and start/stop technology[1]. In litres per 100 km, this translates to approximately 8.3 L/100 km (urban), 5.3 L/100 km (extra urban), and 6.4 L/100 km (combined)[2].
Real-world driving results can vary significantly. Owners report the following typical consumption:
- City commuting: 21–24 mpg (11–13 L/100 km), especially in heavy stop-and-go traffic[1][3][7]
- Quieter urban driving: Up to 27–28 mpg (about 10 L/100 km)[1]
- Open road/highway driving: Common figures range from 28–36 mpg (7–10 L/100 km), depending on speed and driving conditions[2][3]
- High-speed motorway: At 120–130 km/h, expect 27–29 mpg (about 8–9 L/100 km). At very high speeds (150–180 km/h), consumption increases to 17–23 mpg (12–14 L/100 km)[3]
Some users note that aggressive driving or heavy traffic can push city consumption as high as 15 L/100 km (around 19 mpg)[7], while very careful and consistent highway cruising can bring consumption closer to official numbers.