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Mazda's new turbo four fits in both the 6 and the 3

Despite the size differences, the Mazda CX-9 shares a lot with its smaller car-based siblings, the Mazda6 and Mazda3. That could allow Mazda to slot its full-sizer's new 2.5-liter, turbocharged four-cylinder engine under the hood of its smaller offerings. Pardon us while we do a happy dance. "[The 2.5-liter turbo] fits in a lot of our cars, and where we're actually going to put it is another question," Mazda North America vehicle development engineer Dave Coleman told Australia's Car Advice. Coleman specified that the turbocharged engine will fit in all the same applications that can accommodate the company's 2.5-liter gas and diesel engines. "Basically, that big space we used for the bundle of snakes exhaust manifold, the turbo is in that space too. They're all packaged to occupy the same space. It's exactly the same clearance as the exhaust manifold of the other engines." This kind of logic – if Engine A is the same size as Engine B, then both should fit in Car C – is what's lead us to imagine a turbocharged Mazda6 since the new engine was announced. In short, it's great news. Mazda's 2.5-liter turbo is a hell of an engine in the CX-9, and it's hard to imagine it'd be worse in a lighter vehicle. But just because it works from an engineering standpoint doesn't mean it's going to happen. At least, not soon. "It fits. I'm not a product planner so I don't get to make that call," Coleman told Car Advice. "It's up to the product planners to decide what they're going to put it in." The most obvious application for a turbocharged engine in the 3 or 6 is as a reborn Mazdaspeed model. But don't get too excited – Coleman said Mazda hasn't even gotten as far as building an engineering prototype with this engine. We're still firmly at the theoretical stage. And that's bad news, because it gels with what we've been reporting – that Mazda will wait a generation for future Mazdaspeed models. We just stopped doing our happy dance. Related Video:

Fiat version of Mazda MX-5 Miata to be called 124 Spider

Fiat has a definite use for its recent US trademark on the 124 Spider name, and it's something that should make many performance fans quite happy. FCA CEO Sergio Marchionne confirmed to Auto Express that the Italian brand's future roadster would bear the classic name. Auto Express reportedly asked Marchionne directly about the convertible at the 2015 Geneva Motor Show. The CEO said: "Do we want to do it now?" After another executive verified the name, Marchionne responded: "There you go – a world class premiere right in this room!" Autoblog reached out to Fiat Brand communications boss in the US Ariel Gavilan for more information, and he verified the story. Gavilan said that brand head Olivier Francois confirmed the 124 Spider name to international media during a briefing in Geneva. FCA isn't going quite so far as officially confirming that the 124 Spider shares a platform with the latest Mazda MX-5 Miata, but that's almost a certainty. The two automakers jointly developed the chassis, and the original plan was for it to underpin an Alfa Romeo. However, Marchionne didn't want an Alfa assembled outside of Italy. Fiat even hinted at this possible change as far back as the corporation's five-year plan last summer. Insiders tell Auto Express that the 124 Spider reportedly carries retro-inspired style, and hopefully, that means the roadster evokes the look of the original 124 Sport Spider (pictured above) by Pininfarina. Fiat allegedly is also aiming for a weight less than 2,205 pounds, and the engine range is likely comprised of versions of the brand's 1.4-liter turbo. The mill already pumps out 160 horsepower and 183 pound-feet of torque in the Fiat 500 Abarth in the US. According to Auto Express, Fiat and Mazda have an agreement to launch the Miata in 2015 and the 124 Spider in 2016. A hotter Abarth version could come along eventually, too. Related Video:

Mazda's Tokyo concepts have us wishing for more Mazdaspeed

It's been a while since we've seen any new Mazdaspeed machinery, and we're sorry to report that today isn't the day the wait ends. But if you want to see what they might look like based on Mazda's latest models, the Tokyo Auto Salon will be the place to be in a couple of weeks. Turns out the Zoom-Zoom brand has a whole raft of performance models in store for the aftermarket expo. Most intriguing to our eyes is the trio of Racing concepts – one based on the MX-5 Miata roadster, one on the CX-3 crossover, and one on the Mazda6 sedan. Each is done up in black with full aero kit, new rolling stock, and Alcantara interior. An adjustable suspension is the big change to the MX-5 – known simply as the Mazda Roadster in Japan – which also features red trim. As does the CX-3, while the Atenza (which we know as the Mazda6) goes for a more monochromatic, murdered-out appearance. The rally-prepped Mazda2 (known domestically as the Demio) focuses on a stripped-out interior with bucket seats, racing harnesses and a roll cage. There's a spec racing MX-5 in white livery with roll cage and tow hooks as well to join the Global Cup roadster we've already seen. That also goes for the RX-Vision and LM55 Vision Grand Turismo concepts which have already made the rounds but will be on display at the Tokyo salon as well. But it's those three Racing concepts that leave us salivating for production performance models to come – and hopefully come to North America in the process. Related Video: