The losses only seem prevalent for the 2.0-litre diesel; in one case, the 1.6-litre actually gained power.
Swedish publication Teknikens Värld is best known for its Moose Test that challenges a vehicle’s ability to avoid the giant mammal. However, a new evaluation from the team there is showing that Volkswagen Group’s fix for the carmaker’s diesel emissions scandal in Europe is often causing the affected models to lose power and use more fuel.
Teknikens Värld dyno tested 10 VW Group products from Skoda, Volkswagen, and Audi, including ones with affected the 1.6- and 2.0-litre diesel engines, before and after the recall. The publication found higher fuel consumption in nearly all models with the 2.0-litre after the fix. In general, these vehicles also made less torque – by almost 10 percent in the case of one Audi Q5.
When looking at the dyno graph, the recall repair shifted the torque curve peak so that the max figure occurred at a higher rpm. In the real world, this meant that drivers needed to push down harder on the accelerator to feel like they had the same performance as before.
VW is performing a software update for the 2.0-litre diesel, but the 1.6-litre also receives a device that swirls the flow of gases ahead of the air mass sensor. According to Teknikens Värld, none of the 1.6-litre models that it tested lost power. In fact, one of them saw an increase in horsepower and torque output.
“We follow all tests closely which is why we are interested in Teknikens Värld’s test results and how the test was performed,” Marcus Thomasfolk, Head of Communication at Volkswagen Sweden, told Teknikens Värld. “We still have yet to learn the details of Teknikens Värld’s test and the method used and look forward to doing so in order to comment more specifically.”
VW has pleaded guilty to felony charges over Dieselgate in the United States for conspiracy, obstruction of justice, and introducing imported merchandise into the country by means of false statements. The judge is still deciding on the final punishment, which could be in excess of a previously agreed settlement of $4.3 billion.
Source: Teknikens Värld