Did a quick check on Audi's German website: https://www.audi.de/de/brand/de/neuwagen/a6/a6-limousine.html#layer=/de/brand/de/neuwagen/a6/a6-limousine.engine_co

Did a quick check on Audi's German website: https://www.audi.de/de/brand/de/neuwagen/a6/a6-limousine.html#layer=/de/brand/de/neuwagen/a6/a6-limousine.engine_compare.4GC0IC0,4GC0IG0.techdata.html https://www.audi.de/de/brand/de/neuwagen/a6/a6-limousine.htm... The A6 2.0 TDI accelerates faster with an automatic transmission (8.2s vs. 8.4s), and is more fuel efficient (4.4l/km vs 4.5l/km)