Weight has gone up by over 100 kilograms for both models, but performance isn't too bad, with 0 to 100km/h taking under 5 seconds (4.8 for the sedan and 4.9 for the wagon). Many Audi buyers are sure to value the extra torque and better fuel economy.
Part of the reason for the increased weight is a compact, air-cooled lithium-ion battery with a capacity of 0.5 kWh, which is located under the luggage compartment floor and acts as an energy management center. The mild-hybrid system on the S4 models has the potential to reduce customer fuel consumption by up to 0.4 liters per 100 kilometers, Audi believes.
The sedan is rated at around 6.2 l/100 km (45.6 mpg UK), equivalent to CO2 emissions of around 162 grams per kilometer. You can't get a TFSI engine in Europe, though we're sure it will live on when the S4 refresh makes its way to the 2020MY lineup.
The cosmetic changes are simple but effective. At the front, both S4 models feature redesigned Matrix LED headlights, bolder creases in the hood, a new hexagonal grille and other bumper tweaks. Like on the R8 facelift, designers have made a tribute to the original Quattro with small vents.
Around the back, the taillights are the main update, though they've also changed the bumpers a little. The interior features fewer changes than we expected, but Audi promises more customization options and improved connectivity.