The passenger compartment of the Stelvio remained stable in the frontal offset test.  For the front passenger, dummy readings indicated good protection of all critical body areas.  For both dummies, protection of the knees and femurs was good and Alfa Romeo showed that a similar level of protection would be provided to occupants of different sizes and to those sat in different positions.  In the full-width rigid-barrier test, protection of the driver was good and that of the rear passenger was good except for the chest, protection of which was adequate.  Tests on the front seats and head restraints demonstrated good protection against whiplash injury in the event of a rear-end collision.  A geometric assessment of the rear seats indicated good whiplash protection for occupants sat there.  The Stelvio has a standard-fit autonomous emergency braking system.  Tests of its functionality at low speeds typical of city driving showed good performance, with collisions avoided at all test speeds.

In the frontal offset test, protection of both dummies was good or adequate except for the neck of the 10 year dummy, for which readings of tensile forces indicated weak protection.  In the side barrier test, protection of both dummies was good for all critical parts of the body.  The front passenger airbag can be disabled to allow a rearward-facing child restraint to be used in that seating position.  Clear information is provided to the driver regarding the status of the airbag and the system was rewarded.

The protection provided by the bonnet surface to the head of a struck pedestrian was predominantly good or adequate, but weak and poor results were recorded along the base of the windscreen and on the stiff windscreen pillars.  The bumper scored maximum points for the protection it provided to pedestrians' legs but protection of the pelvis region was mixed.  The autonomous emergency braking system can detect pedestrians as well as other vehicles.  The system performed well in tests, with collisions avoided or mitigated in all cases.

The autonomous emergency braking system performed well in tests at highway speeds with collisions avoided in almost all test scenarios and speeds.  The Stelvio has a seatbelt reminder for the front and rear seats and also a standard-fit lane departure warning system.  A driver-set speed limiter is also standard but the method for setting the speed was too complicated to comply with Euro NCAP's requirements and the system was not rewarded.