Audi A3 is smaller. Audi A3 is 2 cm shorter than the Citroen C4, width is practically the same , while the height of Audi A3 is 6 cm lower.
Trunk capacity:
380 litres
408 litres
Trunk max capacity: with rear seats folded down
1220 litres
1183 litres
Audi A3 has 28 litres less trunk space than the Citroen C4. The maximum boot capacity (with all rear seats folded down) is larger in Audi A3 (by 37 litres).
Turning diameter:
10.9 meters
11.5 meters
The turning circle of the Audi A3 is 0.6 metres less than that of the Citroen C4, which means Audi A3 can be easier to manoeuvre in tight streets and parking spaces.
Audi A3 has fewer problems. According to annual technical inspection data Citroen C4 has serious deffects in 195 percent more cases than Audi A3, so Audi A3 quality is probably significantly better
