The horsepower of the Audi A6 C6 Limousine is 4 % bigger when compared to the Citroen C5 III Sedan. As the difference is small this should not affect the car performance in a noticeable way.
The Audi A6 C6 consumes 0.5 l less in the combined cycle when compared to the Citroen C5 III. The difference at the level of 0.5 l is not perceptible. At the same time in the long term it would give a real savings.
The Audi has 1 % longer wheelbase in relation to Citroen. Therefore the Audi is more safe and has a better stability. Besides, longer wheelbase has impact on convenient and more comfortable driving.
Trunk length with seats up
The Audi is 3 % longer in comparison to the Citroen C5 III Sedan 2.0 HDi FAP 163HP automatic. Long vehicles are more spacious and in most cases provide bigger trunk. While the Audi seems to be better option for families or persons who appreciate comfortable rides, the Citroen C5 III Sedan may be more appropriate to the young as it will not make problems with parking and will be easier for turning in narrow streets.
If you are a tall driver or you carry in the trunk thinks of big dimensions, the Audi A6 C6 Limousine 2.0 TDI 170HP automatic, which is by 9 millimeters higher than the Citroen, is appropriate pick for you. However, compared cars do not differ much it the aspect of its height and it should not be much perceptible.