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Midsize Sedan Comparison | Honda Accord vs. Toyota Camry vs. Mazda6

The rumors of the midsize sedan's death have been greatly exaggerated. The 2018 Honda Accord and 2018 Toyota Camry together moved more than 262,000 units through May of this year, which is still a ton of cars. Then again, both are down year-over-year despite being completely, and quite impressively, redesigned for 2018. So yes, the midsize sedan's grip on family transportation is weakening. Ford certainly thinks so, yet this change in consumer preferences comes at a time when the current crop of sedans is sensational. They're bigger and more powerful, yet also more efficient. Safety scores are impeccable. They even look better than ever. So before running out to score one of the bajillion little SUVs flooding the market, why not ponder this trio of midsize sedan all-stars that might actually work better? Over the course of three consecutive weeks we tested the 2018 Camry XSE V6, 2018 Accord Touring 2.0T and the perennial critical-darling 2018 Mazda6 Signature. The latter was thoroughly overhauled and, perhaps as such, bucked the segment trend by actually selling more in June this year. Each was a range-topping trim level with all the bells and whistles, plus the most powerful engine available. Really, you couldn't find cars closer in power, price and feature content. View 57 Photos Performance and fuel economy Toyota bucked the turbocharged trend by sticking with naturally aspirated engines for the 2018 Camry, and when it comes to its 3.5-liter V6, it's sure hard to argue with that decision. For starters, it produces 301 horsepower. Let that sink in for a moment. A 301-hp Toyota Camry. That crushes the others, while its 267 pound-feet of torque is only 6 less than the Accord. This is a strong, smooth engine that only gets better when you realize it matches the 26-mpg combined fuel economy of the others. Honda, meanwhile, followed the masses by switching to a turbocharged four-cylinder for the Accord's engine upgrade (and its base engine, for that matter). Though its 252 hp is considerably down on the Camry and its 271 lb-ft is only a smidgen more, the Accord's torque arrives earlier in the rev range without feeling overtly turbocharged. It also has 143 fewer pounds to contend with. When wrung out, this new 2.0-liter belts out a beautiful, typically Honda song made possible by the smart 10-speed automatic (the base 1.5-liter is paired to a CVT that results in more drone than mechanical music) that thankfully doesn't draw much attention to itself.

Mazda Skyactiv-X Review | The revolution begins with a squeeze-bang

The matte black Skyactiv-X prototype looks like a rough Mazda3, perhaps reconstructed after a bad wreck by an over-enthusiastic owner of a spot welder and lots of gaffers' tape. Ribbed ducts poke out of the dash sending two breaths of conditioned air to no one in particular. Even its revolutionary engine, the thing we're here to experience, is entombed in a massive, nondescript cover to mask its unseemly noises. It's a wild, strange way to meet a very unconventional vehicle that promises diesel-like fuel economy, a wide torque band, and an exotic method for burning less gas than ever before. It takes a few hours for Mazda's engineers to explain the fundamental principles of operation. For more detail, read our Skyactiv-X Spark Controlled Compression Ignition explainer, but here's a very brief overview. Skyactiv-X marries some traditional gasoline engine characteristics with a novel form of compression ignition called SPCCI. The key for Skyactiv-X is to use very high compression in the cylinder and an extremely lean fuel-air mixture. Squeezed right to the cusp of getting hot enough to blow up all on its own (which is very hard to predict), a squirt of extra gas and a spark interject to cross that compression-ignition threshold in a controlled and predictable manner. See the animation below: That takes a few essential components to get just right. One is a massive amount of computer processing power and some pressure sensors in the individual cylinders, because the ambient conditions change how and when these things happen. Skyactiv-X uses a clutched supercharger to pump in additional air when needed to nail the mixture precisely, and high-pressure injectors to get the low ratios of fuel to disperse properly in the chamber. And since it operates like a conventional gasoline engine sometimes, it uses valve timing to lower the very high compression ratio so it doesn't reach combustion ignition in that mode. In practice, the Skyactiv-X runs in compression ignition mode most of the time. In practical terms, that means it drives like a torquey gasoline Skyactiv engine. The torque curve is broad and flat — diesel-like in that respect. That also means it can get away with using a six-speed transmission and a lower final drive for better response. There's enough grunt and economy together that Mazda can let the engine spin faster — at 60 mph, it's running at roughly 1,000 more RPM than a similar gas engine, with greater efficiency.

More head-up displays are coming to a dashboard near you

With the exception of Apple products — $1,000 for a freakin' smartphone? — one great thing about tech is you typically get more for your money with each passing year. This is particularly true with automotive tech: Features like driver assists and surround-view cameras that were once exclusively available in luxury vehicles now come standard even on some economy cars. The same thing is slowly happening with head-up displays (HUD). For example, the 10-inch HUD in the 2018 Toyota Camry is one of the largest and best HUDs I've seen in any car. And a big improvement on the much smaller HUD in the latest Toyota Prius. Mazda is another mainstream brand that offers HUDs in several of its vehicles. But instead of embedding expensive components in the dash and using a special windshield, the HUDs in the Mazda3 and Mazda6 use a thin plastic lens that folds down when not in use. MINI has a similar solution, but this low-cost approach has limits in terms of size and position of the images compared to traditional HUDs that use the windshield as a screen. We're also starting to see similar lens-based aftermarket options that can be added to any car. Last year I tested a portable HUD called Navdy that taps into a car's OBD-II port to provide info on speed and RPM and uses built-in GPS and Google Maps to show the surrounding area, display speed limits and route you to your destination. Navdy also connects to an Android or iOS smartphone via Bluetooth to display data from phone calls, texts and music playing on a connected device, and it's simple to use and easily visible in almost any lighting condition. While Navdy is still available online, late last year the company ran into financial difficulties, and product support has been halted. I recently tested a new portable HUD called Hudly that's not quite fully baked and falls short of Navdy because it doesn't tap into an OBD-II port. Since a companion smartphone app for Hudly isn't scheduled to launch until next month, for now it only mirrors what's on a smartphone. So it can be used for nav and other apps, and its features are very limited. Between automakers adding HUDs in more reasonably priced cars and the aftermarket filling in the gaps for existing vehicle owners with add-ons, the technology is becoming more prevalent and affordable. And it's also getting better.