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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

Renault taking Alpine endurance racing, enters 24 Hours of Le Mans

Renault isn't letting up with the return of its Alpine brand. After announcing a partnership with Caterham to bring a new Alpine to market by 2015 (now expected by 2016), the French firm has announced it is taking Alpine racing again in the European Le Mans Series this year - and that includes The 24 Hours of Le Mans.
It has been 35 years since Alpine last competed in Le Mans, when it won the race outright and dropped the mic as it left the pits, never to return. Before that, in the 11 years it campaigned in the most famous endurance race on the planet from 1963 to 1978, it took seven class wins.
Caterham won't be involved with the race team, however; that will be an effort spearheaded by the Signatech-Nissan team that has been running GT Academy winners in LMS racing. Alpine is preparing an LMP2 chassis that will get a 500-horsepower Nissan engine for this year's championship, with the first two named drivers being Nelson Panciatici (above right) and Pierre Ragues (above left). The third driver for Le Mans will be announced later this month when the racer is launched at the Le Castellet race track in southern France.

2016 Civic, Sonata, Lexus RX, and Altima earn TSP+ from IIHS [w/videos]

The 2016 Honda Civic sedan, Hyundai Sonata, Lexus RX, and Nissan Altima started the year with a bang by earning Top Safety Pick+ honors from the Insurance Institute for Highway Safety. They join 48 other 2016 model year vehicles that IIHS already tested that received the agency's top safety marks. These four models met the IIHS' latest requirement, scoring the agency's best possible score in all five of its crash tests – front, side, rear, rollover, and the difficult small-overlap – to be eligible for the safety accolade. Hyundai improved the 2016 Sonata's structure after the sedan's production began, so this rating only applied to examples produced after October. To get the TSP+ honor, a vehicle's crash prevention tech needs to earn least two points on the IIHS' scale. The lower Top Safety Pick designation can go to model with a "basic" version of these systems like a front collision warning. The Civic, Sonata, and RX scored the maximum six points to get "superior" scores for their optional crash prevention tech because they avoided collisions at up to 25 miles per hour. The Altima was successful in a 12-mph test, but the system slowed the sedan by 10 mph in the 25-mph test rather than completely stopping it. Therefore, the agency awarded the Nissan five points, which was still a "superior" score. You can watch the small-overlap tests for the Civic, RX, Altima, and Sonata respectively below. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. Four more vehicles earn the 2016 TOP SAFETY PICK+ award ARLINGTON, Va. — The Honda Civic 4-door, Hyundai Sonata, Lexus RX and Nissan Altima are the latest vehicles to earn the top award from the Insurance Institute for Highway Safety. The four vehicles join the 2016 winner's circle just one month after the initial crop of 48 TOP SAFETY PICK+ winners was announced. The requirements for TOP SAFETY PICK+ were tightened for 2016. To qualify, winners must earn good ratings in each of the Institute's five crashworthiness tests and have an available front crash prevention system earning an advanced or superior rating.