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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.

Cadillac ATS-V shares track time and new face with CTS-V sibling

It's been about eight months since we last heard anything on the eagerly anticipated Cadillac ATS-V, meaning it was high time a new batch of photos arrived of the twin-turbocharged, V6-powered sedan.
This latest round includes a shot of the hot ATS-V alongside the upcoming CTS-V, allowing us to glimpse through the camouflage and spot the family resemblance between the two über sedans. According to our spies, this is the first time we've gotten a look at the ATS-V's fascia without a nose bra to obscure larger details. This isn't the first time we've seen a vertically slated grille on an in-development Cadillac V car, although it is the first time we've seen it on the ATS-V. Aside from the main grille, the shapes of the sportier front fascia of the ATS-V tie in nicely with its big brother. We are rather curious about the hood on the ATS-V. It's difficult to tell from these images, but it looks like there may be some vents up there that may be meant to improve cooling to the alleged 425-horsepower engine.
Other details that we can see include swollen fenders and larger wheels that hide amplified brakes. The rear of the car remains heavily obscured by camo, with the sole details of note being the quad exhausts, which we've spotted on previous ATS-V prototypes.

2015 Cadillac ATS Coupe priced from $37,995*

Cadillac has released pricing details on its new-for-2014 ATS Coupe. The new model, which will be available with buyer's choice of a 2.0-liter, turbocharged four-cylinder or a 3.6-liter V6 (the ATS Sedan's base 2.5 won't be making the trip) can be had with optional all-wheel-drive in place of the standard rear-wheel setup, while customers can also snag a six-speed manual or six-speed auto.
Prices start at $37,995, which represents a $2,900 premium over the 2014 ATS Sedan (pricing on the 2015 four-door isn't available yet) with the same 2.0-liter engine. Still, the ATS Coupe starts at just over $2,500 less than a base BMW 428i, which is also less powerful and offers less standard equipment. The Caddy is also less costly than the Mercedes-Benz C250 Coupe, although only by about $200. It's even cheaper than the Audi A5, which starts at $38,105, but that model includes all-wheel drive as standard. It should be noted that these prices are without their respective destination charges (*$995 for the Caddy, $925 each for the BMW and the Mercedes and $895 for the Audi).
Unfortunately, Cadillac hasn't released any additional pricing information beyond what we have here, so we can't tell you how much things like all-wheel drive, an automatic transmission or the 321-horsepower V6 will cost. That makes it difficult to figure out just how reasonable the ATS Coupe will be relative to its challengers, but so far, the value equation looks to be in the car's favor. When those full details roll in, though, you know where to look. Scroll down for the official press release from Cadillac.