Diesel (Audi A4) 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 (Volkswagen Passat) 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:
180 HP
250 HP
Torque:
380 NM
320 NM
Acceleration 0-100 km/h:
8.6 seconds
7.2 seconds
Volkswagen Passat is a more dynamic driving. Audi A4 engine produces 70 HP less power than Volkswagen Passat, but torque is 60 NM more than Volkswagen Passat. Due to the lower power, Audi A4 reaches 100 km/h speed 1.4 seconds later.
Fuel consumption
Fuel consumption (l/100km):
6.8
10.1
Real fuel consumption:
8.2 l/100km
10.8 l/100km
The Audi A4 is a better choice when it comes to fuel economy. By specification Audi A4 consumes 3.3 litres less fuel per 100 km than the Volkswagen Passat, which means that by driving the Audi A4 over 15,000 km in a year you can save 495 litres of fuel. By comparing actual fuel consumption based on user reports, Audi A4 consumes 2.6 litres less fuel per 100 km than the Volkswagen Passat.
Audi A4 has fewer problems. According to annual technical inspection data Volkswagen Passat has serious deffects in 30 percent more cases than Audi A4, so Audi A4 quality is probably significantly better
