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Vettel and Coulthard drive Russia's very unfinished Sochi Circuit

The next Winter Olympics will happen in Sochi, Russia from February 7-23, 2014. Sometime after that, barring any delays, a portion of the Sochi Olympic Park will be turned into the Sochi Olympic Park Circuit, a 3.65-mile track for the first Russian Grand Prix in 100 years (the last of two Formula One grands prix were held in St. Petersburg).
As we've come to expect from the Infiniti Red Bull team, it recently sent Sebastian Vettel and brand ambassador David Coulthard to the unfinished venue to run the route in Infiniti M sedans and offer some impressions. With average cornering speeds above 62 miles an hour, Coulthard called it a fast street circuit in the Monaco vein. You can watch them try it out - yes, that's Vettel gone airborne above - and avoid a "White Van Man" in the video below.

Infiniti's variable compression engine in the 2019 QX50 is the first of its kind

The world's first variable compression ratio engine is here, in a production car. That car is the 2019 Infiniti QX50, debuting this week at the Los Angeles Auto Show. The midsize crossover has seen a refresh that has brought it an all-new platform together with new driver assist features, but it's the engine that's the centerpiece here. Nearly everything is continuously variable under the hood of the QX50 – not only the new shift-by-wire XTRONIC CVT. The new VC-Turbo gasoline engine is able to change its compression ratio from 8:1 to 14:1, or anything in between depending of the driving situation; whether there is need for top-end power or turbodiesel-like torque from low revs, or optimized fuel economy. The pistons' reach is continuously adjusted by an electric "Harmonic Drive" motor, which controls a multi-link system, affecting the top-dead-center of the pistons and changing the compression. The engine can also switch between efficiency-maximizing Atkinson cycle and regular combustion cycle, on the go – and there's both multipoint injection and gasoline direct injection employed. The result is 268 horsepower at 5,600 rpm and 280 pound-feet of torque at 4,400 rpm; good figures for a 2.0-liter four-cylinder gasoline engine with a single-scroll turbocharger. Infiniti says that the FWD version's fuel economy of 27 miles per gallon combined is 35-percent better than the previous-generation V6 engine; in AWD guise, it reaches 26 mpg, which is a 30-percent improvement. The new engine is pretty much all-aluminum, but the vaguely magical-sounding "transformative multi-link components" behind the variable compression system are made from high-carbon steel alloy. The engine's multi-link system also enables it to do away with any balancing shafts, and Infiniti compares its smoothness to a V6 rather than a regular four-cylinder. In addition to the aforementioned tech, the VC-Turbo engine has the world's first active engine mount vibration damping system to smoothen its operation even further. Related Video:

2016 Infiniti Q50 Red Sport 400 First Drive

When the original Infiniti Q50 arrived to replace the long-lived G Sedan, our reaction was lukewarm. It lacked poise, refinement, and efficiency, and we hated the Direct Adaptive Steer system. We originally thought of this steer-by-wire system as, "technology for the sake thereof." Infiniti is hoping to address these shortcomings with the 2016 Q50. It gets a new and far improved version of DAS, and a 3.0-liter, twin-turbo V6 sits atop a diversified powertrain family. And at the top of the ladder sits this: the Q50 Red Sport 400. The Red Sport's all-aluminum 3.0-liter V6 pumps out 400 horsepower and 350 pound-feet of torque, the latter of which can be called upon between 1,600 and 5,200 rpm. That low-end thrust is what's most evident out on the road – everything from standing starts to freeway passes are effortless. It's actually kind of ferocious – the tachometer needle climbs relentlessly, and the engine feels strong and purposeful all the way up to its 7,000-rpm redline. It's a refined and smooth powerplant, too, which is a tremendous improvement over the old 3.7-liter V6. The sensations the revised Direct Adaptive Steer system delivers are comparable to the average, modern, electric power-assisted setup. The bigger accomplishment is Infiniti's second-generation Direct Adaptive Steering system. Owners can choose from three steering weights and three levels of responsiveness, but steering adjustments feel more incremental rather than dramatic, so you won't be jarred if you suddenly switch from an aggressive mode to a more comfortable setup. Computer wizardry still can't match natural feedback, but the sensations the revised Direct Adaptive Steer system delivers are comparable to the average, modern, electric power-assisted setup. Make no mistake, that's a huge improvement and it means DAS performs far better dynamically, especially when you ask for its most aggressive behavior. See the differences between the different modes in the video below. Even half-throttle situations in the standard drive mode required counter-steering. Direct Adaptive Steer feels perfectly fine during everyday driving. We spent about 75 percent of our time testing a DAS-equipped car, but hopped into a non-DAS model a the short, 20-mile drive back to our hotel. DAS felt more stable and easy to track down the road – it didn't require the constant, tiny steering inputs of the traditional system.