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MotorWeek revisits 1990 Infiniti Q45

With the one-two punch of the Lexus LS 400 and Infiniti Q45 in the early '90s, Japanese automakers started taking the fight directly to the established V8-powered German flagships on American roads. Here, we get MotorWeek's take on the latter and probably lesser known of those luxury sedans. While not so impressive today, the Q45's 4.5-liter V8 with 278 horsepower and 292 pound-feet of torque was pretty good by the contemporary standards. The big sedan was also offered with an optional all-wheel steering system that made the model quite a capable handler. The rear end even stepped out a just little during MotorWeek's slalom. Unfortunately, styling is very polarizing with these early sedans. Where the early LS looks planted with its big, chunky lines on the outside, the Infiniti is a bit more delicate. The design just doesn't scream about being a flagship sedan. The interior doesn't help sell the car as the top of luxury, either. While MotorWeek likes some of the amenities inside, there are complains about the reused switches from the Nissan Maxima and the extensive use of plastic, rather than wood. With Infiniti now having its sights on the global premium market and soon entering the compact segment, it's fascinating to see the very roots of the brand.

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:

About 20k Nissan Pathfinder, Infiniti JX models recalled for potentially faulty brakes

The National Highway Traffic Safety Administration has issued a recall for the 2013 Nissan Pathfinder and 2013 Infiniti JX due to a problem with the front brakes. The problem is a result of the brake torque member (a part that attaches the brake caliper to the front suspension), which was cast improperly with a structural weakness that could possibly lead to "reduced braking, increasing the risk of a crash," according to NHTSA. How, you ask? If the part breaks, the brake caliper could move position and possibly make contact with the wheel.
Around 20,000 of these sister crossovers are being recalled, but it doesn't sound like all were equipped with the faulty component. Dealers will inspect vehicles built between December 3, 2012 and January 29, 2013, and replace components from the defective batch. The recall goes into effect next month, but until then, the official recall notice is posted below with information for how owners can contact Nissan.