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Cadillac Elmiraj Concept brings big coupe style to Pebble Beach [w/videos]

Two years ago, Cadillac absolutely floored us with the debut of its gorgeous Ciel concept at the Pebble Beach Concours d'Elegance. And since that droptop four-door's debut, we've seen plenty of its design language worked into the latest Cadillac products. Now, we're seriously hoping that history will repeat itself with this stunning new Elmiraj coupe concept, which makes its first public appearance in Monterey this week.
Cadillac states that the Elmiraj concept simply showcases the next step forward for the brand's Art & Science design DNA, and doesn't necessarily preview an upcoming model. But if you told us the Elmiraj was a conceptual look at the next-generation CTS Coupe, or a smaller, two-door version of a new flagship, we'd believe you. At 207 inches long, 76 inches wide and 55 inches tall, its dimensions are only slightly larger than the current two-door CTS.
Regardless of what the Elmiraj does or does not become, it's certainly a fantastic modern interpretation of the classic GT formula with its short front overhang, long hood, rakish roofline and petite rear deck. The strong character lines running along the sides and exaggerated 22-inch wheels round out the beautiful coupe, and Cadillac's signature vertical LED lighting elements are found at the front and rear. Also take note: the badge on the grille is a crest without a wreath, basically confirming our earlier report.

Cadillac CT4 Luggage Test | How much fits in the trunk?

If you go by exterior specs, the Cadillac CT4 is more similar to a BMW 3 Series or Mercedes C-Class. However, if you go by interior space (or price), it's more like a Mercedes A-Class or BMW 2 Series Gran Coupe. That's definitely true of the trunk, which measures a rinky-dink 10.9 cubic feet, according to GM's specs. That number is what you'd expect in a small luxury coupe rather than a sedan. Indeed, the old ATS Coupe had 10.4 cubic feet.  Nevertheless, the CT4 is somehow not the smallest in the segment. That would be the A-Class and its 8.9-cubic-foot trunk. Good grief. Now, Mercedes has been known to shortchange its cargo capacity numbers so we'll have to luggage test that at some point to know for sure. Today, let's see if the CT4 is in keeping with that 10.9 number. Also, how much worse is it than the also rinky-dink CT5 trunk or the overly optimistic 2 Series Gran Coupe? Yep, that looks pretty small. Also, note the weird rail-like things that hampered the CT5 (below right) are also present here in the CT4 (below left). There's also a similar lip to clear for the folding back seat, but the CT4's opening seems bigger.  As in every luggage test I do, I use two midsize roller suitcases that would need to be checked in at the airport (26 inches long, 16 wide, 11 deep), two roll-aboard suitcases that just barely fit in the overhead (24L x 15W x 10D), and one smaller roll-aboard that fits easily (23L x 15W x 10D). I also include my wife's fancy overnight bag just to spruce things up a bit (21L x 12W x 12D). All but the biggest bag fit, which is exactly the same number that could fit in the CT5. As the below photo shows, the bigger car has just a bit more space left over. Maybe for a pair of grocery bags. That would be consistent with the difference in cubic feet: 11.9 cubic feet versus 10.9. What about the BMW 2 Series Gran Coupe? BMW says it has 15.1 cubic feet of space, but it doesn't. At least not using the same measurement criteria that the vast majority of other manufacturers use. It can carry the biggest bag, but it would still need to leave the fancy bag behind. That's also while utilizing the 2 GC's ample under-floor storage compartment.  As such, the CT4 does indeed have a small trunk, but it's at least in keeping with its competitors. The CT5 cannot say that, regardless of which segment you compare it to.  Unfortunately for the CT4, though, the story does not stop here.

GM patent reveals new two-stage turbocharger

Modern turbochargers may be some of the best ever made, but performance is something that engineers are always trying to improve. According to GM Inside News, General Motors (GM) is hoping to alleviate some of the negative aspects of a two-stage turbocharger setup with a newly-patented design. The patent, that was filed on May 19, 2016, reveals a clever bypass system that allows the engine, a four-cylinder unit, to optimize both the low-pressure and high-pressure inlets for its respective functions. According to the filing, a conventional two-stage turbocharger setup is engineered to allow both turbines to operate simultaneously at low and mid engine speeds. At high engine speeds, only the low-pressure turbine works. The setup can't isolate either the low or high pressure side, which can impair low-end performance. GM's new two-stage turbocharger setup looks to eliminate this by linking the high-pressure turbo to the exhaust manifold through the high-pressure inlet duct. The low-pressure turbo is attached to the high-pressure turbo by a low-pressure inlet duct, which is linked to a connecting channel. A single actuator that is housed in the exhaust manifold creates a bypass that can opens the high-pressure inlet or close the connecting channel. Depending on what the engine load and speed is, the ECU guides the actuator—a single rotating spindle with discs corresponding to flanges on the high and low pressure sides—to isolate one of the two turbos. Isolating the turbos allow the respective inlets to be engineered for the best possible fluid dynamic performance. The setup should increase performance and decrease lag. There's no word on what car this setup will make an appearance on, but it will most likely be used in premium vehicles before trickling down to the rest of GM's vehicles. Related Video: News Source: GM Inside News, AutoGuide via GM Authority Cadillac Chevrolet GM Technology Sedan turbo patent engine turbocharging