The results for the Jogger, the UK's cheapest seven-seat car, were based on those achieved by the Dacia Sandero Stepway with which it shares a nearly-identical platform.
The Sandero Stepway scored two stars out of five last year and Euro NCAP compared both cars before verifying that the Sandero Stepway's results could be applied to the Jogger, prior to completing further tests.
Dacia's MPV scored 70% for adult occupant safety and 69% for child occupant safety. It managed a 41% score for vulnerable road user protection and 39% for its safety assist functions.
The Jogger also lost marks because it didn't offer a seatbelt reminder for the rearmost seats and the side-curtain airbag didn't provide sufficient protection for those seated in the back.
“For a family car, this safety performance is disappointing. The vehicle may be more affordable than others in the same category, but in terms of safety, it appears that you do get what you pay for,” said Matthew Avery, Thatcham Research’s chief research strategy officer.
“In this case, not only is the Dacia Jogger lacking the active safety features that buyers expect as standard, but even some of its basic passive safety features aren't up to the industry standard set by the vast majority of car makers.”
A Dacia spokesman said in a statement: "At Dacia, we take the safety of our customers extremely seriously. As a car maker, Dacia’s objective has always been to produce vehicles that meet the expectations of our customers: modern, affordable and fully compliant with European regulations."
The Romanian firm reiterated that it wouldn't "chase Euro NCAP stars" or implement features and technologies "that customers don't want to use and/or pay for".
"The Jogger is a safe new C-segment car that's homologated and compliant with European safety regulations. It's safe and protects occupants to a high standard," Dacia continued.
"It proposes a full list of safety features, providing better protection than most of the cars on the roads of Europe today.
"The Jogger is structurally identical to the Sandero Stepway but has a different roof line towards the rear. Based on the Euro NCAP protocol, Jogger five-seater should have the same rating as the Sandero: four stars in occupant protection and two stars overall. However, there will not be details published about Jogger five-seat version by Euro NCAP. The final rating of Jogger is linked to the seven-seat version only."