1979 Mazda Rx7 on 2040-cars

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50 engineers kept the rotary alive at Mazda for 8 years

The Mazda RX-Vision concept is one of the standouts at this year's Tokyo Motor Show thanks to a drop-dead gorgeous design and a revival of the Wankel engine. The fact that the rotary is still in development at Mazda is thanks to a dedicated group of 50 engineers. According to Automotive News, their dream for the last eight years has been to bring this storied engine design back to the street. It won't be easy. Because of its design, the rotary suffers from poor fuel economy and high emissions. Making the challenge even harder, Mazda reportedly only gives them a small budget, but they continue to chip away at the problem. "These 50 engineers want to develop the rotary engine, therefore they joined Mazda," company research and development boss Kiyoshi Fujiwara told AN. "If I stop the rotary engine, probably they want to leave." For the Skyactiv-R under the RX-Vision's svelte hood, the team reportedly started from the 16X rotary project. Dating back to 2007, that 1.6-liter engine was supposed to improve torque and fuel economy thanks in part to direct injection. After additional development, insiders even suggested that the engineers might have finally solved the powerplant's issues. However, Mazda never put the mill into production, and the RX-8 remains the company's last Wankel-powered model to be offered in showrooms. "We have a dream that one day, this design with a rotary engine will achieve a level that customers will accept," CEO Masamichi Kogai said to AN. Mazda is quite clear that the RX-Vision might never go on sale without a suitable rotary. Although if it does see production, the coupe would likely use a stiffened version of the Miata's chassis, AN reports. Before anyone can place an order, these 50 determined engineers still have a lot of work ahead of them. Related Video:

Mazda files patents for a sequential twin-turbo setup

Mazda has a history of interesting engine technologies, from yesterday's rotary engine to tomorrow's compression ignition engine, and new patents show it still may have some internal combustion tricks up its sleeve. The one on display in these patents isn't especially new in concept, though. A sequential twin-turbocharger setup is something Mazda itself used on the third-generation RX-7. But it's something we haven't seen much of lately. It looks like it could have some possible advantages over older sequential systems, and it has some potential advantages for enthusiasts. First a quick and dirty primer for what makes a sequential twin-turbo system distinct from other twin-turbo systems. In many twin-turbo engines, there are simply two turbos that work together as one bigger turbo. They're the same size, and they spool up at the same time. With a sequential setup, at low rpm, a smaller turbocharger is spooled up first at low-rpm for quicker throttle response, and as the rpm and exhaust pressure increases, a valve opens up that allows a larger turbocharger to also spool up and provide high-rpm boost. That's basically how the Mazda design shown above functions. A big flap blocks off the larger turbocharger exhaust inlet, channeling all the exhaust to the smaller turbo. When more exhaust is available at high rpm, it looks like that flap opens up to spool up the big turbo, too. What's interesting here is that the way the turbochargers are packaged takes up less space than past systems. It looks like both turbos are contained in one unit that shares the same exhaust outlet, meaning the exhaust manifold could be kept simple and compact. In fact, the piping for compressed intake air could also be shared, reducing the amount of piping, which would further decrease the amount of materials and possible failure points. There are a number advantages of making this system smaller. The potential applications of the system are much greater, since it could fit in smaller cars with smaller engine bays. Making the system smaller also means that there won't be as much weight, which is important from both fuel economy and performance standpoints. Finally, the smaller setup likely uses fewer materials, which could make the system cheaper and thus easier to offer on a wider range of vehicles, or at least more profitable for Mazda.

Should you buy a leftover 2015 or a brand new 2016 model?

One of the most common questions I get asked as a car dealer and auto auctioneer is, "When is the best time to buy a new car?" The answer is usually the time period between Labor Day and the middle of November. That's because this is when new car dealers and the manufacturers are trying to get rid of their current-model-year vehicles to make way for a small army of 2016 models. Rebates, incentives, cheap financing, and overstocks of unpopular models all help create the liquidity needed to turn the old inventory into a new set of wheels for the buying public – often at a very reduced price. But sometimes the "old" new car isn't a better pick than the "new" new car. It depends on a lot of factors, including the car in question and the differences from one model year to the next. I recently received an email from Jeff, who is interested in the Mazda CX-9 and asks whether he should buy a 2015 model or wait for the new version that will debut soon in LA. I'll use his as the example case. Length of Ownership The longer you own a vehicle, the less model year depreciation will be an issue. For example, the difference in value between a five-year-old Mazda 6 and a six-year-old version is about $1,500 according to the Manheim Market Report ($5,600 vs. $4,100). But if you look at the difference between 10-year-old and 9-year-old versions of that same vehicle, the price difference shrinks all the way down to $200. Because Jeff plans to own his new crossover for many years, the 2015 model wins in this category. View 19 Photos Rebates and Incentives The current CX-9 has a $4,000 cash incentive from Mazda. This is in part because Mazda still has quite a few left over. That $4,000 rebate for the current model is already coupled with even stronger discounts at the dealer level for those leftover 2015 models. TrueCar is showing that a loaded 2015 model can be had for $7,000 off the sticker at $28,600. You may even be able to beat that price by negotiating the deal yourself. Another thing to consider is that new models tend to be in high demand when they launch, which means that your purchase price will likely be substantially higher with the new model than it will with a leftover 2015. Again, financially speaking, this is a vote for the 2015 model. New Stuff It's also important to weigh what new features will come along with the updated model and how important they are to you.