For enhanced safety, the front and rear seat shoulder belts of the Ford Fusion have pretensioners to tighten the seatbelts and eliminate dangerous slack in the event of a collision and force limiters to limit the pressure the belts will exert on the passengers. The Alfa Romeo Giulia doesn't offer pretensioners for the rear seat belts.
For enhanced safety, the front seat shoulder belts of the Ford Fusion are height-adjustable to accommodate a wide variety of driver and passenger heights. A better fit can prevent injuries and the increased comfort also encourages passengers to buckle up. The Alfa Romeo Giulia doesn't offer height-adjustable seat belts.
The Fusion's driver alert monitor detects an inattentive driver then sounds a warning and suggests a break. According to the NHTSA, drivers who fall asleep cause about 100,000 crashes and 1500 deaths a year. The Giulia doesn't offer a driver alert monitor.
The Fusion has standard SYNC®, which uses a global positioning satellite (GPS) receiver and a cellular system to get turn-by-turn driving directions or send emergency personnel to the scene if any airbags deploy. The Giulia doesn't offer a GPS response system, only a navigation computer with no live response for emergencies, so if you're involved in an accident and you're incapacitated help may not come as quickly.
Both the Fusion and the Giulia have standard driver and passenger frontal airbags, front side-impact airbags, driver and front passenger knee airbags, side-impact head airbags, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding, daytime running lights, rearview cameras and available rear parking sensors.

