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A look inside Infiniti's variable-compression engine

We're sympathetic to anyone who had trouble understanding what's going on with Infiniti's new variable-compression engine. While we got a full tech briefing on the novel VC-Turbo back in August, the visual aids were lacking. The cutaway engine Infiniti brought to the Paris show fixes all of that. You can thank the little green and pink lines on the cutaway for making the whole idea a little more clear. Click through the gallery to see two lines – one green and one pink – that represent the different strokes allowing for different compression ratios. Remember, the compression ratio is the amount of volume in the cylinder on intake compared to the amount at the end of the compression stroke. Leave more room at the end and you lower that ratio. The length of the stroke doesn't change with this system, but where it sits along the cylinder does. Hence those two lines. The variable compression ratio allows this new turbocharged engine to maximize fuel economy when the turbo isn't needed by raising the compression ratio. It will see its first use in the next Infiniti QX50 crossover, previewed by the QX Sport Inspiration concept that's also on display in Paris, and has performance targets of 268 horsepower and 288 pound-feet of torque. After, it will migrate to other Infiniti and Nissan vehicles, with transverse front-drive-based applications first in line. Eventually, it's likely to completely replace Nissan's corporate 3.5-liter V6. We'll be poking around the engine a little more in Paris today to try and get some more info. For now, enjoy those cutaway images and those friendly little lines. Featured Gallery Infiniti VC-Turbo engine cutaway View 14 Photos Paris Motor Show Infiniti Nissan Technology Emerging Technologies engine 2016 paris motor show

Race Recap: 2015 Hungarian Grand Prix is Magyar for 'What a race!'

Every driver on the Formula 1 grid dreams of taking home the silverware, but only one driver each year can do it. Barring disaster in 2015 it looks like it's going to be Lewis Hamilton. The Brit has been so dominating at the front of the grid on Saturday, we can't see how he'll miss out on winning the second annual FIA Pole Position Trophy. That's the accolade introduced last season in another manufactured attempt to give drivers something to work for on Saturday, since the FIA felt leading into the first corner didn't have the pull it used to. Hamilton took his ninth pole of the season in Hungary for Mercedes-AMG Petronas with a crushing lap that put him almost six tenths ahead of his teammate Nico Rosberg in second. All Hamilton needs is one more spot at the top of the grid this season, and he's the Pole Position trophy winner. Thrilling stuff. Behind Rosberg the gaps stayed smaller, Sebastian Vettel in the Ferrari a little more than a tenth behind Rosberg, Daniel Ricciardo in the Infiniti Red Bull Racing less than four one-hundredths behind Vettel. We feel almost as vexed watching Kimi Raikkonen as he feels driving – he's finally got a good Ferrari, now he can't get a good weekend. The front wing broke on his car in Free Practice 1, then a water leak in Free Practice 3 robbed him of setup time on the soft tire. He lines up in fifth about two tenths behind Ricciardo. The slow, tight Hungaroring didn't agree with the Williams chassis, Valtteri Bottas the first of the Grove team drivers in sixth, his teammate Felipe Massa two places back. Between them is Daniil Kvyat in the second Red Bull in seventh. Teenager Max Verstappen put in a good showing in the Toro Rosso to grab ninth, while Romain Grosjean in a wriggling, squishy, sliding Lotus classified his appearance in Q3 at all as "a miracle." As for the race that followed, we don't expect to see another like it for a long time – it was the real thrilling stuff, one shock after another. The drama began after the first parade lap, when Felipe Massa lined up out of position and the start was aborted. The drivers did another parade lap, then lined up with everyone in place. Mercedes got swamped as soon as the lights went out. Vettel ran around both of them and led the race into the first turn, Raikkonen had come from fifth to third by Turn 1, then got the inside line on Rosberg through Turn 2 to take second place.

Infiniti went out of its way to make the QX30 not a Mercedes

You can complain all you want about perceived badge engineering when a company (like Mercedes-Benz) sells a platform to another brand (such as Infiniti). The reality is that most buyers won't know the difference, and they won't even realize their Infiniti is really a Mercedes underneath or that their neighbor's GLA has the same basic parts as the QX30 they just bought. What's weird to me isn't that sameness, but the places where the two cute little utes differ. These two vehicles, which are more like tall hatchbacks, use the same Mercedes 2.0-liter turbo four and seven-speed dual-clutch transmission. Infiniti adds its own throttle and transmission calibrations. The suspension design is the same, although there are tuning differences. Both come standard with front-wheel drive, with all-wheel drive an option. Fuel economy matches for the FWD models, while the AWD Infiniti lags behind the Mercedes for some reason. So they're very similar despite their different looks. And design makes sense as a point of differentiation. Frankly, they go further than a lot of vehicles on shared platforms do – further, in fact, than the upcoming Nissan Navara-based Mercedes X-Class pickup does. The QX30 has its own sheetmetal and glass to separate it from the GLA-class. You probably think one looks better than the other. If you know where to look, the signs of sameness are obvious. Most major systems and pieces are shared, like the steering wheels (with different center covers), most switchgear, and things like interior and exterior door handles. Shared parts are fine as long as the parts are good ones. On that note, how many Tesla buyers realize their steering column and stalks, plus the window switches, come from Mercedes? And does that actually matter? We'd argue no. About those differences. Many are functional, like the fact the Infiniti does not carry over the Benz's Brake Hold feature – when you roll to a stop in the GLA (or any other Benz), pressing the brake pedal firmly applies the electric parking brake until you hit the gas to move again. The QX30 has an electric parking brake, but no Brake Hold feature. Someone used to driving Mercedes models will look a bit silly standing on the brake pedal to no effect. Ask us how we know. The Mercedes gauge package is carried over, but with the Infiniti font. Makes sense, although it's off-putting at first if you've seen the original, prompting a weird deja vu. Circular dash vents are replaced by rhomboid ones.