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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

These are your top 10 worst-selling vehicles of 2012

Despite 2012 being the best year of auto sales this country has seen since 2007, not every vehicle got an equally large share of the sales pie. Some barely got a sliver, as evidenced by this year's list of the top 10 worst-selling vehicles of 2012. We've dug through sales data from every automaker to come up with this year's list and, like last year, we've set some parameters to ensure it includes legitimately bad-selling vehicles. The first parameter is a starting MSRP under $100,000, which automatically excludes what's parked in most one-percenters' garages. We're also excluding vehicles cancelled in 2012, even if they garnered sales through the end of the year while dealerships sold off remaining inventory. This includes models like the Mitsubishi Eclipse, Mercedes-Benz R-Class and last year's worst-seller, the Acura RL. Next, vehicles are considered as they are reported by the automaker, which means that, while sales of the Murano CrossCabriolet were probably low enough to make the list, because Nissan reports only one number for all Murano sales, it was excluded. Cadillac, however, reports sales of the Escalade EXT separately from the Escalade, hence its repeat appearance. Finally, there was the question of whether or not eligibility should be given to Suzuki vehicles, as the brand announced in November that it would end sales in the US as soon as its current inventory ran out. We decided Suzuki vehicles should be included as the brand was offering 2013 models at the time of the announcement, and as far as we can tell, inventory levels remained high enough to satisfy demand through the end of the year. Without further ado, below are the top 10 worst-selling vehicles of 2012. Top 10 Worst-Selling Vehicles of 2012 10. Volvo C30 MSRP: $25,500 Units Sold: 2,827 Last Year: – 9. BMW Z4 MSRP: $47,350 Units Sold: 2,751 Last Year: – 8. Audi TT MSRP: $39,545 Units Sold: 2,226 Last Year: – 7. Subaru Tribeca MSRP: $32,595 Units Sold: 2,075 Last Year: 10 6. Suzuki Equator MSRP: $19,449 Units Sold: 1,966 Last Year: 7 5. Cadillac Escalade EXT MSRP: $63,060 Units Sold: 1,934 Last Year: 6 4. Nissan GT-R MSRP: $96,820 Units Sold: 1,188 Last Year: – 3. Acura ZDX MSRP: $50,920 Units Sold: 775 Last Year: 4 2. Mitsubishi Lancer Sportback MSRP: $18,495 Units Sold: 702 Last Year: 3 1. Mitsubishi i-MiEV MSRP: $29,125 Units Sold: 588 Last Year: – Want a little more "worst-selling" data? Check out our list of the top 10 worst-selling vehicles of 2011.

Nissan reviving Pulsar name for Euro market

The Nissan Pulsar doesn't have what we'd consider a rich history in the US, other than on some models decades ago. However, the nameplate has been part of the Nissan lineup globally since 1978 and has proven popular in Asia and Australia. Now, the brand is teasing a five-door hatch to revive the name and hit European showrooms this fall.
The new Pulsar will be built at the company's recently renovated factory in Barcelona, Spain. It's not clear from the teaser whether this is the same model that is already sold in other parts of the world or a brand new vehicle. Although, Nissan says in the announcement that the car "has been designed to meet the specific demands of European car buyers."
With competitors like the Volkswagen Golf and Ford Focus, the European five-door hatch market is seriously competitive. It will be interesting to see if Nissan will have something special to bring to the table. Scroll down to read Nissan's full teaser about its latest hatchback in Europe.