The passenger compartment of the VF8 remained stable in the frontal offset test. Dummy numbers showed good protection of the knees and femurs of both the driver and passenger. Structures in the dashboard were considered to pose a risk of injury to occupants of different sizes and to those sitting in different positions, and the score for this body area was penalised.  In addition, the driver’s knee airbag deployed in a way that provided no protection to the inboard leg, attracting a further penalty.  Analysis of the deceleration of the impact trolley during the test, and analysis of the deformable barrier after the test, revealed that the VF8 would be a somewhat aggressive impact partner in a frontal collision. In the full-width rigid barrier test, protection of the chest was rated as marginal for the driver and rear seat passenger, based on dummy readings of chest compression.  A penalty was applied to the knee, femur and pelvis body region owing to the incorrect knee airbag deployment.  In the side barrier test, dummy numbers indicated good protection of all critical body areas.  However, the side curtain airbag deployed incorrectly, getting trapped on the interior trim, and a penalty was applied to the head.  The same penalty was applied in the side pole test.  Control of excursion (the extent to which a body is thrown to the other side of the vehicle when it is hit from the far side) was marginal. The VF8 has a counter-measure to mitigate against occupant to occupant injuries in such impacts.  However, in Euro NCAP's test, the heads of the driver and front passenger made contact and protection was rated as poor. Tests on the front seats and head restraints demonstrated good protection against whiplash injuries in the event of a rear-end collision.  A geometric analysis of the rear seats also indicated good whiplash protection.   The VF8 has an advanced eCall system which alerts the emergency services in the event of a crash.   The car also has a system which applies the brakes after an impact, to avoid secondary collisions.  VinFast demonstrated that if the car entered water the doors, if locked, could be opened within two minutes of power being lost but not that electric windows would remain functional long enough to allow occupants to escape.

In both the frontal offset and side barrier tests, good protection was provided to all critical body areas for both child dummies, and the VinFast VF8 scored maximum points in this part of the assessment.  The VinFast is equipped with automatic disabling of the front passenger airbag to allow a child restraint to be used in that seating position.  VinFast demonstrated that the system operated robustly and the system was rewarded.  The VF8 is equipped with a direct 'child presence detection' system, which issues a warning when it detects that a child or infant has been left in the car. However, VinFast could not demonstrate to Euro NCAP’s satisfaction that all requirements were met, and the system was not rewarded. All of the child restraint types for which the VF8 is designed could be properly installed and accommodated in the car.

Protection of the head of a struck pedestrian or cyclist was predominantly good or adequate, with poor results recorded at the base of the windscreen and on the stiff windscreen pillars.  Protection of the pelvis and of the knee and tibia was mixed but that of the femur was good at all test locations.  The autonomous emergency braking (AEB) system of the VinFast can respond to vulnerable road users as well as to other vehicles.  The system performed well in tests of its response to pedestrians, including the protection of those behind the car who are vulnerable when the car is reversing. The system scored well in tests of its reaction to cyclists, including dooring, in which the car prevents or warns against door opening if a cyclist is approaching from behind.  Similarly, the AEB system performed well in all tests of its response to motorcyclists and scored full points.

Overall, the autonomous emergency braking (AEB) system of the VinFast VF8 performed adequately in tests of its reaction to other vehicles.  A seatbelt reminder system is fitted as standard to the front and rear seats.  The lane support system gently corrects the vehicle’s path if it is drifting out of lane and also intervenes in some more critical situations.  The speed assistance system identifies the local speed limit, and the driver can choose to allow the limiter to be set automatically by the system.