Both the Giulia and the A4 have standard driver and passenger frontal airbags, front side-impact airbags, driver and front passenger knee airbags, side-impact head airbags, front seatbelt pretensioners, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights, rearview cameras, available all wheel drive, crash mitigating brakes, lane departure warning systems, blind spot warning systems, front parking sensors and rear cross-path warning.
The engine in the Giulia has a single overhead cam for simplicity. The engine in the A4 has dual overhead cams, which add to the number of moving parts and the complexity of the cylinder heads.
The Giulia’s 2.0 turbo 4 cyl. produces 28 more horsepower (280 vs. 252) and 33 lbs.-ft. more torque (306 vs. 273) than the A4’s 2.0 turbo 4 cyl.
For better handling and stability, the track (width between the wheels) on the Giulia is 2.7 inches wider in the rear than on the A4.
The Giulia is 3.5 inches shorter than the A4, making the Giulia easier to handle, maneuver and park in tight spaces.
Because it has more passenger and cargo room, the Giulia is rated a Mid-size car by the EPA, while the A4 is rated a Compact.
The Giulia has 8 cubic feet more passenger volume than the A4 (100 vs. 92).
The Giulia has a standard remote vehicle starting system, so the vehicle can be started from inside the driver's house. This allows the driver to comfortably warm up the engine before going out to the vehicle. The climate system will also automatically heat or cool the interior. The A4 doesn’t offer a remote starting system.
The A4’s cornering lamps activate a lamp on the front corner when the turn signal is activated. The Giulia’s optional adaptive cornering lights turn the actual headlight unit up to several degrees, depending on steering wheel angle and vehicle speed. This lights a significant distance into corners at any speed.
When the Giulia is put in reverse, the rearview mirror tilts from its original position. This gives the driver a better view of the curb during parallel parking maneuvers. Shifting out of reverse puts the mirror into its original position. The A4’s mirror doesn’t automatically adjust for backing.