Editorial view:

The 2.0 TDI diesel engine is far and away the biggest seller in the 2018 A4 range due to its exceptional combination of fuel economy, emissions and usable everyday power. Audi offers the engine in a choice of front wheel drive or 4 wheel drive in the quattro model, and just to confuse you the model is listed as the TDI in some models and the Ultra in others. This is because Audi uses the Ultra brand on its most fuel efficient models that use low rolling resistance tyres, however on the S Line (and usually the Black Edition too) the wheels and tyres are much larger sportier tyres designed to give more grip and they have an adverse effect on the fuel consumption, hence they are not called Ultra on those models.

The 2.0 TDI 150 horsepower Ultra model is the most fuel efficient, with CO2 figures of 99g/km and official EU combined fuel economy figures of 74.3 miles per gallon, making it great for the executive business user who wants to keep their personal taxation levels low.

The 2.0 TDI 190 horsepower ultra model ups the CO2 only slightly to 102g/km and the EU combined fuel figure is 72.4mpg.

If you go for the S Line model or above and hence have the non-ultra spec, expect to add a 5-10g/km onto your CO2 rating and lose a few mpg on those figures. Similar with the qualttro drivetrain, as the 4 wheel drive gubbins adds around 100kg to the weight of the car and some friction into the drivetrain, your CO2 jumps to 114, and fuel economy drops to 64.2mpg. The Quattro model only comes in the higher 190 horsepower specification.

Our complete selection of new 2018 Audi A4 2.0 TDI deals is shown above, just select the car you're after to see our dealers best prices and special offers on a New 2018 Audi A4 2.0 TDI For Sale, either as a cash deal or with Audi low rate finance.