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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.

Infiniti-Red Bull Racing will seek a fourth title with the RB9 [w/video]

This is the car and the team that everyone wants to dethrone. The stability of this year's regulations means that the Infiniti Red Bull RB9 is a seriously honed RB8; however, that's a situation probably no other team would complain about seeing that the RB8 recovered from early stumbles and reliability issues last year to carry Sebastian Vettel to a third consecutive driver's title and the team to a third consecutive constructor's trophy.
The most noteworthy revisions to the car are the partial vanity panel that omits the driver cooling slot, the even narrower rear end - a feature of just about every car launched so far - and purple sidepods to showcase new title sponsor Infiniti. Adrian Newey, perhaps the most feared designer on the pit lane, said the nose and front wing could be changed relatively easily throughout the season, but he wanted to make sure to get the middle of the car - everything from the sidepods, back - as good as possible since they're more difficult to re-engineer. His track record leads us to believe he did just that.
Below are two videos, one of the making of the RB9, the other the launch at team headquarters in Milton Keynes.

Jeremy Clarkson names 10 worst cars for 2015 and 2016

When Jeremy Clarkson, outspoken automotive journalist, ex- Top Gear host, and co-host on The Grand Tour, drives a car he doesn't like he doesn't pull his punches. As Jezza harshly puts it, cars shouldn't just be a form of transportation. These 10 cars made Clarkson's "the terrible 10" list on his column in The Sunday Times for lacking imagination and not giving the journalist "the Fizz," which his list of top 10 cars did. In typical Clarkson fashion, the list is controversial. Some of the cars on Clarkson's list have received praise from other outlets, which shouldn't really come as a surprise since he usually goes against the majority's opinion. Nonetheless, there's at least one car that will catch you off guard. To get a glimpse at Clarkson's reviews and the entire list of cars, head over to his column in The Sunday Times. Vauxhall Astra SRi Nav Infiniti Q30 Premium Tech Skoda Superb SE L Executive Zenos E10 S Renault Kadjar Signature Nav BMW X1 xDRIVE25d SEAT Leon X-Perience SE Technology Nissan GT-R Track Edition Volkswagen Scirocco 2.0 TDi Hyundai i800 Related Video: Featured Gallery Jeremy Clarkson's Terrible 10 For 2015 and 2016 View 11 Photos News Source: The Sunday TimesImage Credit: Clive Brunskill / Getty Images Celebrities BMW Hyundai Infiniti Nissan Toyota Performance bmw x1 infiniti q30