Mercedes-Benz C-Class C200 vs BMW 3 Series 320i: real MPG, tax and cost per mile
Side-by-side UK comparison of the Mercedes-Benz C-Class C200 and BMW 3 Series 320i on the metrics that actually drive ownership cost: real-world efficiency, road tax (VED), insurance group and depreciation outlook.
Comparison table
| Mercedes-Benz C-Class C200 | BMW 3 Series 320i | |
|---|---|---|
| Fuel type | petrol | petrol |
| Body style | saloon | saloon |
| Years | 2021–2024 | 2019–2024 |
| Real-world efficiency | 38 mpg | 36 mpg |
| Official efficiency | 47 mpg | 44 mpg |
| CO₂ (g/km) | 137 | 145 |
| Road tax year one | £540 | £680 |
| Road tax standard | £620/yr | £195/yr |
| Insurance group | 32/50 | 28/50 |
| Depreciation | average | average |