Luke Madden headed to Portugal, for Auto Express, in order to sample Audi’s recently facelifted A4 to see how it stacks up against the likes of the latest BMW 3 Series and Mercedes-Benz C-Class. The 100 kW (136 hp) 2.0 L TDIe model on test has a CO2 figure of just 112 g/km, needs only 4.2 litres of fuel per 100 km, and can hit 100 km/h (62 mph) in a respectable 9.3 seconds.