Well from what I know all an Acura is, is an overpriced Honda. So I can't image it being that expensive to maintain or fix. I really can't speak on the differences between the two, but I can offer a little bit of advice. If you’re worried about the cost to maintain a BMW maybe you should think about getting a different car. Usually people who purchase a BMW, purchase them because of the fact that it’s an excellent engineered automobile. BMW spends a lot of time and money on each car before it’s shipped out to sell and the consumers recognize the commitment that BMW has to excellence. Also if you decide to purchase a BMW make sure it has been certified by a local BMW dealership. As far as which one will last longer depends on the owner before and present. If you keep up on the maintenance and take care of your vehicle any vehicle will last a long time.