The SRV4 was the fourth prototype built in 1974 as a Safety Research Vehicle (SRV), it was based on the Mini Clubman.

The SRV4 featured an extended wheelbase to accommodate a greater frontal crumple zone. The front of the car was also designed to be pedestrian-friendly, being both softer and smoother than that of the standard car. Other refinements included larger-diameter wheels with run-flat Denovo tyres, strengthened door sills and recessed door handles.

The safety of the car’s occupants was catered for with copious padding.