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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.

2021 Cadillac Escalade vs. 2020 Lincoln Navigator | How they compare on paper

The 2021 Cadillac Escalade arrived late last night, and we all know what that means: It’s comparison time. Specifically, weÂ’re pitting the new Escalade versus the 2020 Lincoln Navigator. The sales gap between the long-time competitors has grown dangerously close for Cadillac ever since the revolutionary new Navigator came out for the 2018 model year. In 2019, the Navigator was only about 4,000 units down from the Escalade. Cadillac intends to widen that gap back up with a new truck, and now itÂ’s time to see if itÂ’s brought the right goods to the party. With the redesigned model that now features an independent rear suspension, these two are more alike than theyÂ’ve been in a long time. The Escalade was stuck with the less space-efficient solid rear end up until now, as GM hadnÂ’t yet made the switch to IRS that Ford long-ago did. Now that it has, these two are super similar from a dimensions perspective. Cadillac was playing catch-up in this fight, so it knew exactly where it needed to aim to come out victorious in a specs battle such as this one. A quick note on the chart below. Both of these models have a “regular” and “long” version. The EscaladeÂ’s long variant is still named ESV, and the NavigatorÂ’s long version is simply named L. In the dimensions section, we distinguish between the two with a “/” — the “regular” length version is on the left, and the “long” version is on the right side of the slash. The numbers are below: Powertrain The Lincoln Navigator still reigns supreme when it comes to power, as the 3.5-liter twin-turbo V6 is high on both horsepower and torque. GMÂ’s small-block V8 comes close, but ultimately falls short by 30 horsepower and 50 pound-feet of torque to the twin-turbo V6. Cadillac does have an ace up its sleeve, though. It comes in the form of the 3.0-liter turbo-diesel inline-six engine. Lincoln hasnÂ’t dropped the PowerStroke diesel into the Navigator (and we'd be shocked if it does), so Cadillac has a unique offering in this segment now. The diesel will be optional on the Escalade, but it has less horsepower and the same amount of torque as the V8. We expect the big advantage for the diesel will come in fuel economy, an area where the Silverado Duramax diesel currently outpaces the full-size truck competition. Both of these big SUVs come standard with 10-speed automatic transmissions. Intriguingly, itÂ’s the 10-speed automatic that was co-developed between Ford and GM.

Cadillac Escalade gets $5,000 discount to ward off Lincoln Navigator

General Motors apparently isn't going to let early good reception for the redesigned Lincoln Navigator steal thunder from its own luxury SUV without a fight. It's offering a $5,000 discount on the purchase or lease of the Cadillac Escalade this month to any buyer who trades in a 1999 or newer Lincoln model, Bloomberg reports. GM spokesman Jim Cain told Bloomberg the incentive is being offered to keep prices competitive for the Escalade. The 2018 Navigator starts at $72,055, compared to $73,995 for the Escalade, but the outgoing version of the Navigator is selling for an average of around $53,000, compared with more than $80,000 on average for the Escalade, he said. The Escalade was the top-selling domestic luxury SUV in October and No. 4 in the segment, according to Motor Intelligence. It far outsold the Navigator, which last saw a refresh in 2015 and a full redesign in 2007. But Ford is hoping to gain back some ground with the new Navigator and updated Expedition, which also trails the Chevrolet Tahoe and Chevy Suburban in its segment. Bloomberg notes that one Morgan Stanley analyst estimates that GM owns a $2 billion annual pretax profit edge in the lucrative luxury sport utility segment. Our recent First Drive review called the new Navigator "far superior to its primary competitor, the Cadillac Escalade."Related Video: