I would disagree that the Volvo 240s are safe to drive, and I the newer Volvos are significantly better. The old Volvos are loved dearly for doing their best to protect their occupants for the time, but compared to early 2000s Volvos, the vintage Volvos are not safe to drive save for your love of the car or the vintage experience.
You were right to wonder how old airbags aged. Volvo recently recalled some cars from the 2000s to replace the original ZF/TRW-sourced airbags after an incident where an original airbag exploded with shrapnel.
Volvo said they no longer believe that there's an expiration date on SRS systems, so the SRS system is expected to work for the lifetime of the vehicle as long as there's no warning light. The recalled airbags are presumably a defective design or construction rather than proof of an expiration date (
the replacement airbags use a different propellant, and it appears that the recalled airbags were damaged by humidity just like Takata airbags, despite using different propellant than Takata).
Airbag Expiration Response from Volvo
The new Volvos are better due to more advanced materials (like boron steel) and structure, and even the 1990s
Volvo 900 series, despite being derived from the older 700 series , received more advanced metal meant to improve safety (therefore it is safer than its predecessor, the 700 series and the 200 series).
The newer Volvos also have one of several generation of SIPS to protect you from side collision.
Also the Volvo 200 series, despite being able to support the entire weight of the car in each pillar (from the advertising), does not have as strong a roof as you would hope. As you can see, the
240's roof can't handle a severe rollover. A 2003 XC90
can (albiet the test is not as severe), probably due to stronger materials and thicker pillars.
This poor 940 got really mangled from a small modern Renault! I think it's the most compelling evidence that the old Volvos are not "safe" to drive depending on your risk tolerance.
The side impact airbags and side impact structure significantly reduce injuries, by at least half compared to the 240 or other Volvos before SIPS was implemented. You can compare the side impact injury rates (representing MAIS2+ injuries) from this
study, baseline being the 240 and similar, gen 1 being Volvos from the 90s with SIPS.
Volvo side impact protection generations (cars sampled)
Baseline
- 240/260 MY - -93
- 740/760/780 MY - 92
- 940/960 MY -91
Generation I
- 850 MY 92–94
- 940/960 MY 92–95
Generation II
- 850 MY 95–96
- 940/960 MY 96–98
- S70/V70/XC70 MY 97–99
Generation III
- S80 MY 99–06
- V70 MY 00-08 (classic)
- S60 MY 01–09
- XC70 MY 01–07
- XC90 MY 02-
Generation IV
- S80 MY 07- -
- V70/XC70 MY 08- -
- XC60 MY 09-
Injury rate is defined as the number of injured of a certain level of AIS divided by the total number of occupants (injured as well as uninjured) in the group considered.
Volvo said "A continuous improvement in
car structure and implementation of different specialized safety systems have resulted in significant improvements in car safety over the past few decades. Isaksson-Hellman and Norin (2005) showed a reduction of the risk of MAIS2+ injury by more than two thirds in Volvo cars when comparing cars designed from 1970s to the most recent models."
Also check out the diagram from a
Volvo article showing the deformation of the 240 from a 35 mph side impact, vs the 35 mph crash tests by IIHS or Euro NCAP performed on modern cars. We would call it a bit more than preferred, even if some people escape with minor injury from side crashes in 240s.
It's still impressive that the baseline (240 series) injury rate is not as high as I'd expect for the old design!
If I had to choose a vintage car to experience and drive, I'd choose a 240. Or a Mercedes (since they invented the crumple zone). Maybe an Audi with proconten. 🙂 I think driving a new safer car could be an important difference if you god forbid find yourself in a crazy crash. Like those head on crashes.