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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

Eau Rouge Lite: Infiniti Q50 gets 400-hp, twin-turbo V6

The Infiniti Q50 Eau Rouge is still (probably) dead. But as consolation prizes go, a new 400-horsepower, twin-turbocharged V6 isn't bad. The 3.0-liter biturbo will be offered in two different states of tune. Enthusiasts will flock towards the aforementioned 400-hp model, but the first VR series engine will also be sold in a 300-hp version, as well. Regardless of output, both engines have a very broad torque curve, ranging from 1,600 to 5,200 rpm with either 350 or 295 pound-feet. A Mercedes-sourced, 2.0-liter, turbocharged four-cylinder will serve as the Q50's new base engine, matching the CLA250's 208 hp and 258 lb-ft of torque. The hybrid powered Q50 soldiers on, as do a line of standard seven-speed automatic transmissions. The naturally aspirated 3.7-liter V6 appears to be gone. Another big enhancement for the updated Q50 is a revised version of the widely disliked Direct Adaptive Steer system. Infiniti says its engineers "optimized the control logic to improve feedback from the road" – a huge area of complaint with the current steer-by-wire system. The Q50's new engine lineup will be showrooms later this winter. Read on for the official press release from Infiniti, and stay tuned for more from the brand – including the new Q60 Coupe – at the upcoming Detroit Auto Show. Related Video: Infiniti Announces New 3.0-liter V6 Twin-Turbo Engine – the Most Advanced V6 Ever Offered by Infiniti • New VR-series engine becomes the lightest, most powerful, cleanest and most fuel-efficient V6 engine that Infiniti has ever offered• Two power outputs available: 400 or 300 horsepower• Series of technical innovations enhance drivability and performance• Compact layout features new integrated exhaust manifold• The 3.0-liter V6 twin-turbo engine family will first be available in the 2016 Infiniti Q50 sports sedan NASHVILLE (Dec. 15, 2015) – Infiniti's new compact, lightweight 3.0-liter V6 twin-turbo engine is the most advanced V6 engine that the brand has ever offered, striking an ideal balance between drivability, efficiency, and performance. The 3.0-liter V6 twin-turbo is an all-new engine from the new and exclusive VR- series powertrain family, born out of the brand's longstanding heritage of V6 powertrain production. The new engine has been engineered to empower the driver and offer increased power and torque and higher levels of efficiency than any comparable predecessors from the company.

Infiniti Q60 Concept previews sexy styling, twin-turbo V6

Okay Infiniti, this was worth the waiting and teasing. Behold, the Q60 Concept, the coupe that foreshadows a future production two-door while also introducing a new family of 3.0-liter, twin-turbocharged V6 engines. It's fair to say we like it very much. Of course, this is not our first unfettered look at the Q60 Concept. Infiniti's final "teaser" image showed off the final product, but now we can analyze it from all angles, including the lovely, almost S-Class Coupe-like rear end and the clean, fashionable cabin. The Q60 Concept's design, particularly in the swoopy profile, comes across as organic and muscular, particularly in the shape of the front fenders and rear haunches. The car's dead front view reveals a few styling details that were overshadowed by the angle of the teaser image, like the interesting ridge that runs from the grille into the powerfully domed hood. A fixed glass roof gives the cabin an open-air feel, while the overall layout is largely reminiscent of the current Q50 sedan, only with cleaner, updated materials that we wouldn't bet on making production. Thin sport seats look supporting and feature quilted leather bolsters, while a two-tone steering wheel spices up the driving environment. Under the Q60 Concept's hood is the same 3.0-liter, twin-turbocharged V6 that was first shown on the Q80 Inspiration Concept from the 2014 Paris Motor Show. According to Infiniti, the direct-injected six-pot will arrive in a production car within the next two years. In the Q60, a seven-speed automatic handles power delivery, although it's unclear if a similar gearbox would be used alongside the production engine. Other notable features on this sleek two-door include Infiniti's Direct Adaptive Steering system and the new InTuition system, which promises a "fully customizable digital environment." Of course, we'll have much, much more on the Q60 Concept tomorrow, when it makes it arrives on the floor of the 2015 North American International Auto Show in Detroit. Scroll down for the full press release from Infiniti. January 11, 2015 Infiniti Q60 Concept: Fusing exhilaration and power - Infiniti's precursor to a high-performance sports coupe - Unique proposition of striking styling and high-output powertrain in a premium package - Previews new family of powerful and efficient engines Hong Kong/Detroit – Infiniti has set out to captivate the imagination and exhilaration of sports coupe fans with the stunning Q60 Concept.