You seem to have settled on one of these two cars. Based on that, I did a little research on their reliablity here on True Delta and Consumer Reports (you could do the same).
https://www.truedelta.com/Acura-TLX-vs-Volvo-S60-reliability-comparison,1286-288
https://www.consumerreports.org/cars/volvo/s60/2016/ratings
https://www.consumerreports.org/cars/acura/tlx/2016/overview/
Using the above data unforunately doesn't help all that much. TD says neither are terrible but that the Volvo has about twice as many problems. CR says the opposite- the Volvo is more reliable and has happier owners.
In general I'd say that "the street" reputations slightly favor the Acura but Acura's reputation for producing engaging, reliable cars seems to be declining over the last 5 years.
If you are willing to broaden you prospects I strongly recommend test driving the Audi A4 or Buick Regal. CR rates either of these much higher in the "Compact Luxury" segment than your two choices (sorry about that!) with the Audi getting their highest scores. The Audi's current reputation is the opposite of Acura with the A4 gaining more accolades and increasingly reliable. When most people think of the A4 they think Quatro (AWD). But actually the A4 is available as a FWD car but few dealers actually stock the FWD version.
Personally I'd go for the A4 FWD model based on previous experience, but you may have to special order it (that's a good thing as you can then get the exact equipment and color you want & no one else is gonna test drive your car!). We drove a 2002 A4 FWD for 4 years/50,000 miles. It was comfortable, performed well, got great mileage (30+ mpg overall) and gave us no problems. The advantage of the FWD vs AWD is lower initial cost and better fuel economy. The disadvantage is lower resale value. However after 10 yrs and 200K resale isn't gonna be great on any of the above.
Last but not least, bear in mind that the Compact Luxury segment cars generally have lots of bells and whistles which tends to make them more problematic. Keeping any of the above for 10 years / 225K is likely to have you spending some coin to keep them working properly. Hopefully not a "money pit", but going to cost you more than most Camry's, Accords, or upscale Kia's.
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