Nissan's Altima has catapulted from an also-ran among sedans to one of the current segment leaders.

Shopping for a modern midsize sedan is tougher than you may think. Whether we're talking about the Honda Accord, Toyota Camry, Mazda6, or Hyundai Sonata, it seems like each year we conclude it can’t possibly get any better. Deciding among sedans is tough because nearly every player in the segment brings its absolute A game every year.

The Nissan Altima is all-new for 2019 and delivers a ton of improvements. But considering the competition, are those improvements enough to launch it from a middling entrant to a serious contender?

The previous Altima had some things going for it, like spacious seating and a powerful V6 (if you were willing to pay extra for it). And by the final year of its fifth generation, some driver-assistance features arrived as standard, but it never stood out in any particular area.

For decades, buyers didn’t expect sedans to be anything more than reliable, economical daily commuters. But the pendulum has swung in the opposite direction. Check out the competition: The Honda Accord, Toyota Camry, Hyundai Sonata, and Mazda6 are all near-premium cars, with the latest infotainment and safety technology, and they handle well, too. The new Altima has some of those things—let's see how it delivers on the rest.