Engine chain usually needs to be replaced less often than the timing belt, but the cost of replacing the chain is usually higher. Chain motors are considered to be more reliable, but noisier and more vibration generating.
Performance
Power:
184 HP
180 HP
Torque:
390 NM
370 NM
Acceleration 0-100 km/h:
8.3 seconds
9.1 seconds
BMW 3 series is more dynamic to drive. BMW 3 series engine produces 4 HP more power than Audi A6, whereas torque is 20 NM more than Audi A6. Thanks to more power BMW 3 series reaches 100 km/h speed 0.8 seconds faster.
Fuel consumption
Fuel consumption (l/100km):
8.1
8.1
Fuel tank capacity:
63 litres
70 litres
Full fuel tank distance:
770 km in combined cycle
860 km in combined cycle
1000 km on highway
1120 km on highway
750 km with real consumption
760 km with real consumption
Audi A6 gets more mileage on one fuel tank.
Drive type
Wheel drive type:
Rear wheel drive (RWD)
Front wheel drive (FWD)
Engines
Average engine lifespan:
560'000 km
330'000 km
Engine resource depends largely on regular maintenance and the quality of the oils and fuels used, but under equal conditions the average life of a BMW 3 series engine could be longer.
Engine production duration:
12 years
6 years
Engine spread:
Installed on at least 3 other car models, including BMW 5 sērija, BMW X5, BMW 7 sērija
Installed on at least 2 other car models, including Audi A4, Audi A8
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.
Dimensions
Length:
4.48 m
4.80 m
Width:
1.74 m
1.81 m
Height:
1.41 m
1.48 m
BMW 3 series is smaller. BMW 3 series is 32 cm shorter than the Audi A6, 7 cm narrower, while the height of BMW 3 series is 7 cm lower.
Trunk capacity:
435 litres
455 litres
BMW 3 series has 20 litres less trunk space than the Audi A6.
Turning diameter:
10 meters
11.7 meters
The turning circle of the BMW 3 series is 1.7 metres less than that of the Audi A6, which means BMW 3 series can be easier to manoeuvre in tight streets and parking spaces.
Audi A6 has fewer problems. According to annual technical inspection data BMW 3 series has serious deffects in 10 percent more cases than Audi A6, so Audi A6 quality is probably slightly better
