Diesel (Audi A3) engines typically outperform gasoline engines in terms of fuel efficiency and low-end torque. This makes them more economical and better suited for towing or long-distance travel. However, gasoline (Mercedes A class) engines mostly are lighter, quieter, and offer better acceleration and responsiveness, especially in smaller vehicles. For more information, see the article "Diesel or Petrol: Fuel Economy and Key Differences."
Performance
Power:
110 HP
102 HP
Torque:
250 NM
180 NM
Acceleration 0-100 km/h:
10.7 seconds
10.6 seconds
Audi A3 engine produces 8 HP more power than Mercedes A class, whereas torque is 70 NM more than Mercedes A class. Despite the higher power, Audi A3 reaches 100 km/h speed 0.1 seconds later.
Both cars are similar in size. Audi A3 is 1 cm longer than the Mercedes A class, width is practically the same also the height of the cars does not differ significantly.
Trunk capacity:
380 litres
341 litres
Trunk max capacity: with rear seats folded down
1220 litres
1157 litres
Audi A3 has more luggage capacity. Audi A3 has 39 litres more trunk space than the Mercedes A class. The maximum boot capacity (with all rear seats folded down) is larger in Audi A3 (by 63 litres).
Turning diameter:
10.9 meters
11 meters
The turning circle of the Audi A3 is 0.1 metres less than that of the Mercedes A class.
Mercedes A class has fewer problems. According to annual technical inspection data Audi A3 has serious deffects in 15 percent more cases than Mercedes A class, so Mercedes A class quality is probably better
