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Infiniti's new VC-T changes the rules of small turbocharged engines

The upcoming Infiniti QX50 crossover does not get our pulse racing, no matter how shapely the QX Sport Inspiration concept that previews it may be. No midsize SUV does, to be fair. But it has something special under the hood – the world's first production variable-compression-ratio engine. That means the QX50's 2.0-liter turbo four, which makes 268 horsepower and 288 pound-feet of torque, will have up to 27 percent better fuel economy. Here's how it works. The trend of moving to smaller, turbocharged engines carries with it one big falsehood. Under low load when the turbo isn't needed, these engines are less efficient than an equivalent engine without a turbo because of the low compression ratio the turbo requires. That is, if you never need the extra power, you're wasting fuel. Turbocharged (and supercharged) engines use a lower compression ratio to prevent detonation. When you force extra air in a cylinder and mix it with fuel, it's more likely to prematurely go boom. Lowering the compression ratio prevents this problem, but it's less efficient. Infiniti's VC-T promises the best of both worlds, with a compression ratio that ranges from 8.0:1 for high-power turbo needs to a 14.0:1 ratio for fuel-sipping efficiency. At its heart the VC-T engine is a simple idea, but it's complicated to explain. Consider yourself warned. The photo below from Infiniti serves as a good visual overview. For the truly nerdy, this patent application covers the mechanical concept. Instead of having the pistons connected to the crankshaft, Infiniti's engine has a pivot arm with a connection on each end. One end connects to the piston, the other connects to a second lower shaft, which is controlled by an actuator arm. At any given time the engine's pistons move up and down according to the lobes on the crankshaft. But the actuator arm can change the angle of the pivot arm up and down. That is, the pistons still move in the same motion with the same stroke, but phase the entire stroke up or down. Move the pivot up and there's less room at the top, which means a higher compression ratio. Move the pivot down and the compression ratio goes down, too. As an added bonus, the lower shaft eliminates the need for counter-rotating balance shafts. Infiniti says this system works constantly and can vary the compression ratio to any number between 8:1 and 14:1. It also uses electronic variable valve timing on the intake valves to switch into Atkinson-cycle combustion for greater efficiency.

Production Infiniti QX80 will be revealed at Dubai Motor Show

Back at the New York auto show, Infiniti showed the QX80 Monograph concept, which indicated what direction the updated production QX80 would go. At this year's Dubai auto show, we'll get to see how close the QX80 gets to the concept, since that's where the production car will debut. And thanks to some teaser images from Infiniti, we get a solid sneak peak at the SUV. Immediately apparent is that many key styling cues have made it to production, but the overall car has been notably toned down from the already relatively conservative concept. We're glad to see that the headlights have completed their trip up the front fascia, matching up better with the corporate trapezoidal grille and providing a wider, more aggressive look. The jutting, Leno-esque lower valence of the concept has been reduced to more modest proportions, but the basic shape of the lower grilles remains the same. It also appears that the fenders haven't been pumped up as much as the concept's. The mild redesign matches what will probably be very mild mechanical changes. Previous reports have said that the new QX80 will retain the same platform and powertrain as the current model. We wouldn't be surprised, though, if there have been some suspension tweaks and maybe a few extra horsepower squeezed from the current 400-horsepower 5.6-liter V8. Also, though Infiniti hasn't revealed when the SUV will go on sale, we would expect it to arrive at dealers early next year. Related Video: Featured Gallery 2019 Infiniti QX80 Image Credit: Infiniti Infiniti SUV Luxury Off-Road Vehicles dubai motor show infiniti qx80 infiniti qx80 monograph

These are the cars most likely to be damaged in an accident

Data from Insurify shows which models have the most accident-prone drivers behind the wheel. It also shows the proportion of the drivers of said vehicles with an at-fault accident on record in the past seven years, based on Insurify’s analysis of over 4 million car insurance applications. For reference, the national average is 10.78%, and each of these vehiclesÂ’ drivers represent a statistically significant increase over that. Now, it would be easy to infer that these cars are dangerous, but such is not necessarily the case. Remember, drivers cause accidents, not cars. These just happen to be the cars that accident-prone drivers drive. YouÂ’ll notice that many are mainstream, affordable cars, often with decent crash ratings. Also keep in mind that vehicle accidents are up since the beginning of the pandemic, so no matter what you drive, please drive safely. 10. Hyundai Ioniq This affordable, electrified vehicle platform sneaks into this list with 14.45% of drivers with a recent at-fault accident on record. 9. Lexus CT Another hybrid, this Prius-powered Lexus beats the national average at 14.57%. 8. Toyota Prius V Yet another hybrid, the larger but discontinued member of the Prius family sees 14.72% of its drivers with recent accidents. 7. Mazda CX-3 The Mazda CX-3, which is discontinued for the 2022 model year, sees the accident-prone making up 14.9% of its drivers. 6. Infiniti Q60 The second and final luxury car on this list has more accident-prone drivers than average, at 14.93%. 5. Subaru Impreza The first of two Subarus on this list has 15.1% of drivers with recent accidents on record. 4. Hyundai Genesis Coupe The Genesis Coupe was only on the market for a brief span before it was discontinued and Genesis spun off into its own luxury brand. That said, it too beats the national average for accidents, at 15.29%. 3. Subaru WRX Despite its standard all-wheel drive, the boy-racer WRX has 15.44% of drivers with a prior accident in the last seven years. 2. Kia Stinger We love the Kia Stinger, and had great luck with our long-termer that graced the Autoblog garage for a year. That said, 15.75% of its drivers represent have a recent accident on record. 1. Scion FR-S This fun two-seater attracts the most accident prone drivers, with 15.87% with recent at-fault crashes. Related video: