The Aston Martin DB11 has standard driver and front passenger side knee airbags mounted low on the dashboard. These airbags helps prevent the driver and front passenger from sliding under their seatbelts or the main frontal airbags; this keeps them better positioned during a collision for maximum protection. Knee airbags also help keep the legs from striking the dashboard, preventing knee and leg injuries in the case of a serious frontal collision. The Portofino doesn’t offer knee airbags.
The DB11 has standard head airbag curtains which act as a forgiving barrier between the driver and front passenger's upper bodies and the window and pillars. Combined with high-strength steel door beams and lower side airbags this system increases head protection in broadside collisions. The Portofino doesn't offer side airbag protection for the head.
The DB11 has a standard Birds-eye Camera to allow the driver to see objects all around the vehicle on a screen. The Portofino only offers front and rear parking sensors that beep or flash a light. That doesn’t help with obstacles to the sides.
Both the DB11 and the Portofino have standard driver and passenger frontal airbags, front side-impact airbags, four-wheel antilock brakes, traction control, electronic stability systems to prevent skidding and front and rear parking sensors.