Over 200 people are killed each year when backed over by motor vehicles. The GranCabrio has standard Rear Emergency Braking that uses rear sensors to monitor for objects to the rear and automatically applies the brakes to prevent a collision. The 718 Boxster doesn’t offer backup collision prevention brakes.
The GranCabrio has all-wheel drive to maximize traction under poor conditions, especially in ice and snow. The 718 Boxster doesn’t offer all-wheel drive.
The GranCabrio’s optional lane departure warning system alerts a temporarily inattentive driver when the vehicle begins to leave its lane and gently nudges the vehicle back towards its lane. The 718 Boxster doesn’t offer a lane departure warning system.
The GranCabrio offers an optional Surround View Camera to allow the driver to see objects all around the vehicle on a screen. The 718 Boxster only offers a rear monitor and front and rear parking sensors that beep. That doesn’t help with obstacles to the sides.
To help make backing out of a parking space safer, the GranCabrio’s optional Rear Cross Path uses sensors in the rear to alert the driver to vehicles approaching from the side, helping the driver avoid collisions. The 718 Boxster doesn’t offer a rear cross-path warning system.
The GranCabrio’s optional 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 718 Boxster doesn’t offer a driver alert monitor.
Both the GranCabrio and the 718 Boxster have standard driver and passenger frontal airbags, front side-impact 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 and available blind spot warning systems.
The Maserati GranCabrio weighs 1093 to 1297 pounds more than the Porsche 718 Boxster. The NHTSA advises that heavier cars are much safer in collisions than their significantly lighter counterparts.

