As with the TFSI engines, Audi offers the four-cylinder TDI engines with its displacement of 1,968 cc in two power versions. The first delivers 110 kW (150 hp) and torque of 320 Nm (236 lb-ft) between 1,500 and 3,250 rpm; the second delivers 140 kW (190 hp) and torque of 400 Nm (295 lb-ft) between 1,750 and 3,000 rpm.
The 2.0 TDI clean diesel features several sophisticated technical solutions - with separate cooling circuits, two balancing shafts in the crankcase, a cylinder-pressure sensor, substantially reduced inner friction and a common-rail fuel injection system with a maximum pressure of 2,000 bar. Emissions stay low thanks to high- and low-pressure exhaust-gas recirculation and multi-stage exhaust-gas aftertreatment including an SCR system (selective catalytic reduction).
Even the less powerful version with 110 kW ensures high performance: The A4 Sedan with seven-speed S tronic and front-wheel drive accelerates from zero to 100 km/h (62.1 mph) in 8.7 seconds and has a top speed of 219 km/h (136.1 mph); the corresponding figures for the A4 Avant are 9.0 seconds and 213 km/h (132.4 mph).
In combination with the manual six-speed transmission, the Sedan and the Avant have fuel consumption of just 3.8 and 4.0 liters per 100 kilometers (61.9 and 58.8 US mpg) and emissions of 99 and 104 grams of CO2 per kilometer (159.3 and 167.4 grams per mile).
sStrong propulsion: 2.0 TDI with 140 kW (190 hp)
In the version with 140 kW (190 hp), the 2.0 TDI clean diesel is also a highly efficient engine. With it, the new A4 Sedan with seven-speed S tronic and front-wheel drive has NEDC fuel consumption of 4.1 liters per 100 kilometers (57.4 US mpg) and CO2 emissions of 107 grams per kilometer (172.2 g/mi). The new A4 Avant consumes 4.2 l/100 km (56 US mpg) and emits 109 g/km of CO2 (175.4 g/mi).
The powerful four-cylinder diesel engine also delivers an impressive performance: acceleration from 0 to 100 km/h (62.1 mph) with front-wheel drive and S tronic in 7.7 seconds for the Sedan and 7.9 seconds for the Avant; top speeds of 237 km/h (147.3 mph) and 231 km/h (143.5 mph) respectively.
The two 2.0 TDI engines will also be available as "ultra" versions - a badge that signifies the most efficient version of each model series. Modifications to the transmission ratio, bodywork and suspension as well as the use of tires with optimized roll resistance reduce fuel consumption even further. The A4 ultra with manual transmission and 110 kW (150 hp) has NEDC fuel consumption of just 3.7 liters per 100 kilometers (63.6 US mpg) and CO2 emissions of 95 grams per kilometer (152.9 g/mi); the corresponding A4 Avant ultra consumes 3.8 l/100 km (61.9 US mpg) and emits 99 g/km CO2 (159.3 g/mi). No competitor in the premium segment has better figures.
Another 2.0 TDI engine will be added after the market launch with power output of 90 kW (122 hp).