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Cadillac confirms 420-hp twin-turbo V6 for 2014 CTS [w/videos]

The 2014 CTS will break cover next week at the New York Auto Show, but Cadillac has released a few details of what we can expect to find under the car's hood. As we saw in some spy shots back in January, the biggest news for the midsize Caddy will be a twin-turbocharged V6 producing a whopping 420 horsepower and 430 pound-feet of torque.
This LF3 engine will be paired to a new eight-speed automatic transmission, which will help balance performance and fuel economy. We still don't know how much the 2014 CTS has grown in terms of size and weight, but General Motors says that new sedan will return 17 miles per gallon in the city and 25 mpg highway with the new engine to go with a 0-60 mile per hour time of 4.6 seconds - that means the new CTS will have the fuel economy close to the current base model sedan and acceleration not too far from the current CTS-V. General Motors also confirmed that this twin-turbo V6 will be available in the 2014 XTS this fall.
The next-generation CTS will carry over the 3.6-liter V6 from the current car (likely as a base engine) and also add the 2.0-liter turbo four-cylinder from the ATS. Check out all the details on this new engine and watch a few videos (including GM's nifty tilt rig) by scrolling below.

Cadillac CTS-V gets Stealth Blue and Silver Frost limited edition models

A little more than a year and a half ago, former weekend editor Alex Nunez and I were talking about how sweet it would be for Cadillac to offer a CTS-V in the Corvette's Supersonic Blue paint, and as if General Motors eavesdropped on our conversation, this showed up. And while the Stealth Blue car you see here isn't an exact duplicate of the hot-looking sedan GM showed off in prototype form, it's really close. And really sweet.
New for 2013, the Cadillac CTS range gets two new colorful editions, starting with the Stealth Blue package available on the CTS-V (in sedan, coupe and wagon bodystyles) as well as the naturally aspirated CTS coupe. In addition to the unique paint, blacked-out grille and dark satin wheels, Stealth Blue cars can also be done up with an optional Twilight Blue leather interior. (And you thought blue-on-blue color schemes died in the '90s.)
Cadillac is also offering a new Silver Frost package, but it's a bit more exclusive. Only 100 examples will be built, all in CTS-V Coupe form. The Silver Frost paint is a low-gloss matte finish, in that while it technically has a clearcoat covering, it's reduced in a way that the surface still appears flatter than standard paint. Even so, Cadillac states that the car should be hand-washed only.

How GM's grueling 24-hour test gets the kinks out of its performance cars

One of the biggest challenges automakers face when designing a high-performance car is making sure that it is both fast and reliable. For General Motors, any car that might be taken to the track by its owner - like the Corvette, Camaro Z/28 (shown above) and the Cadillac CTS-V, for example - undergoes a rigorous and strenuous 24-hour test by engineers at the Milford Proving Grounds, as pointed out by Car and Driver.
We've posted on this topic in the past - on a video showing the Camaro ZL1 being brutalized, for instance - but this article gives a more in-depth look at what actually happens behind the scenes... including what that poor ZL1 went through. Though the test isn't for 24 hours straight, the cars are pushed as hard as possible by some of GM's best drivers with only the brakes and tires replaced frequently.
We don't want to ruin the fun for you, but it is an interesting article that tells just some of what GM does to develop its sports cars. Check out the full article over at Car and Driver for the rest of the story.