This has yielded an increase in headroom – a good 2cm in front and extra elbow room.
Rear boot space is unchanged at 425 litres.
The front is dominated by a large Singleframe with honeycomb grille that is flanked by striking headlights.
It is offered with a choice of two TFSI engines and one TDI engine at launch.
The 35 TFSI, a 1.5-litre direct injection engine, produces 150ps and is available with a newly developed six-speed manual transmission or a quick-shifting seven-speed S tronic.
Besides the cylinder on demand technology, the powertrain in conjunction with the S tronic dual-clutch transmission uses a 48-volt mild hybrid system.
It recovers energy during deceleration, supports the engine with up to 50Nm of torque when driving off and accelerating from low engine speeds and allows the A3 Sedan to coast with the engine switched off.
In everyday driving, it reduces consumption by up to 0.4 liters.
The 2.0 TDI with 150ps also has a seven-speed S tronic.
The suspension of the new A3 Sedan has been tuned to be more sporty – a touch more precise than in the predecessor model.
The cockpit of the A3 Sedan has a central MMI touch display and includes handwriting detection as well as natural language control.
The 10.25-inch instrument cluster behind the steering wheel is digital even in the basic model.
It has the new A3 Sedan has the new MMI Navigation plus infotainment system, which uses the third-generation modular infotainment platform (MIB 3).
The MIB 3 boasts computing power ten times higher than in the predecessor model, connects the car via LTE Advanced speed, and connects the smartphones of the passengers to the Internet via Wi-Fi hotspot.