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Mazda Miata celebrates 25 years of rocking our worlds

For its birthday it hasn't been profiled on 60 Minutes or been to Jay Leno's Garage, doesn't go on a retrospective tour of vintage racetracks or get a special Spyder Zagato edition. That doesn't mean we think any less of the Mazda MX-5 Miata, the roadster with a simplicity that was as enjoyable as it was barely believable when it arrived in 1989. A quarter of a century and three generations later, the Miata remains the go-to roadster when you want easy, balanced and economical thrills.
It grew from a 116-horsepower speedster with a five-speed manual transmission and a curb weight of 2,116 pounds, to a 167-hp go-kart with a five-speed manual coming in at 2,480 pounds (in Sport guise). Along the way it's picked up hundreds of awards, including 14 nods on Car and Driver's "10Best" list, its most recent eight-year streak coming to an end last year, the Guinness Book of World Records title as "Best-Selling Two-Seater Sports Car" and innumerable trophies as weekend racer extraordinaire.
We'll see the fourth generation at next year's Chicago Auto Show, and we're certain to hear more about its 25-year milestone this year. Until that happens, enjoy the images above and the gallery and press release below.

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.

2014 Mazda6 Skyactiv-D Wagon

This was sort of a quirky surprise drive opportunity. I've been over here in Italy for a while now, and Mazda Italia contacted me seemingly out of the blue to drive test some version of the Mazda6 with a diesel engine. Supremo. The Mazda6 is a sexy everyday beast and I have been digging their SkyActiv-D engines for a while now. Very spirited units.
My contact phones me the day of, and says he can come by with the car, and then we'll head off to some sort of special spot for dynamics testing and technical conversation. Nice deal, say I.
My guy Ernesto pulls up outside of the house and - lo and behold - it's a dang Mazda6 station wagon with the very most recent 2.2-liter SkyActiv-D motor good for 148 horsepower and healthy 280 pound-feet of torque. The wee four-banger with 14.0:1 compression ratio hauls this 3,260-pound wagon around with the best of them. A decent 0-to-60-mph time of 8.7 seconds, too.