BMW 3 series engine produces 6 HP less power than Mercedes C class, whereas torque is 30 NM less than Mercedes C class. Despite less power, BMW 3 series reaches 100 km/h speed 0.2 seconds faster.
Fuel consumption
Fuel consumption (l/100km):
7.9
7.6
Real fuel consumption:
9.0 l/100km
9.2 l/100km
By specification BMW 3 series consumes 0.3 litres more fuel per 100 km than the Mercedes C class, which means that if you drive 15,000 km in a year, the BMW 3 series could require 45 litres more fuel. But when we compare the real fuel consumption reported by users, BMW 3 series consumes 0.2 litres less fuel per 100 km than the Mercedes C class.
Fuel tank capacity:
60 litres
66 litres
Full fuel tank distance:
750 km in combined cycle
860 km in combined cycle
960 km on highway
1130 km on highway
660 km with real consumption
710 km with real consumption
Mercedes C class gets more mileage on one fuel tank.
Engines
Average engine lifespan:
420'000 km
440'000 km
Engine resource depends largely on regular maintenance and the quality of the oils and fuels used.
Engine production duration:
11 years
13 years
Engine spread:
Installed on at least 4 other car models, including BMW 1 sērija, BMW X3, BMW X1, BMW Z4
Installed on at least 3 other car models, including Mercedes E klase, Mercedes CLK, Mercedes SLK
In general, the longer and for more car models an engine is produced, the better its serviceability and availability of spare parts. BMW 3 series might be a better choice in this respect.
BMW 3 series has fewer problems. According to annual technical inspection data Mercedes C class has serious deffects in 30 percent more cases than BMW 3 series, so BMW 3 series quality is probably significantly better
