2013 Cadillac Ats Performance on 2040-cars

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Why an independent rear suspension for GM's new, full-sized SUVs wasn't easy

A Motor Trend report last month laid out how Cadillac's 4.2-lier twin-turbo Blackwing V8 could be an orphan due to cost concerns in the GM empire. Last-minute chassis changes to Cadillac's new sedans and XT6 crossover led to engine bays that couldn't fit the Blackwing. On the SUV side, according to the report, the new independent rear suspension for big people haulers cost so much to implement that GM ruled out reworking the Escalade to accept the Blackwing. At least one commenter rightly asked how could a suspension swallow that much money. A new piece in Motor Trend has the answer. The excellent Alissa Priddle spoke to Tim Herrick, GM's executive chief engineer for full-size trucks, about why the clean-sheet IRS cost "multimillions of dollars."  First, GM would need to build a new body shop at the Arlington, Texas plant that assembles the automaker's big SUVs to stamp the numerous wholly new parts and panels accommodating an IRS. Then GM would need to design and pay for a new assembly process. On top of those up-front costs, there was the incremental cost of the four-link IRS components being more expensive than those in the trucks' former leaf-sprung solid axles. Herrick endured so many rejections for so long that he remembers the date and time when he got approval for the new unit. He said it came down to a meeting where he told a higher-up, "I'll make you a deal: If we get to the reveal, or if we launch this and you think this was a dumb idea, I'll hand you my badge and let you walk me out." Head to Motor Trend to read the full story. Based on Herrick being on stage to help present the new SUVs to the press, and on our First Ride in the new Chevrolet Tahoe and Suburban at GM's Milford Proving Grounds, it appears this will have a happy ending for all involved. Furthermore, since Herrick worked on the T1 platform that supports the big SUVs as well as the light- and heavy-duty pickups, he understood the demands on the commercial side, too. That could be why when Roadshow asked Tim Asoklis, chief engineer of the Tahoe and Suburban, if the new IRS could endure life in the Chevrolet Silverado and GMC Sierra, Asoklis answered, "Oh, absolutely." Related Video:    

40+ cars that barely avoid the gas guzzler tax

The Gas Guzzler schedule, with mpg ratings and charges that haven't changed since 1991, lays out which fuel-swillers owe what to Uncle Sam.
I started thinking about the "Gas Guzzler Tax" - considerably less well known as The Energy Tax Act of 1978 - when I was driving Dodge's new Challenger SRT Hellcat last week. Unsurprisingly for a car that can burn 1.5 gallons of gas per minute at max tilt, theoretically able to empty a full tank of premium in about 13 minutes, the Hellcat will be subject to the Gas Guzzler Tax schedule when it goes on sale.

Best luxury SUVs of 2022 and 2023

Once upon a time, the idea of a luxury SUV meant a Range Rover, and even that was pretty agricultural by modern standards. Then Jeep Grand Cherokees and Ford Explorers started offering fancy, range-topping versions followed soon by Lexus, BMW and Mercedes dipping their toes in the water. And then the floodgates opened. Today, there is a staggering number of luxury SUVs available in every shape, size and price point. There are electric luxury SUVs like the Tesla Model X and Jaguar I-Pace, as well as gas-swilling, high-performance SUVs like the BMW X5 M and Cadillac Escalade V. Sports car makers Porsche, Aston Martin and Lamborghini have even dived in.  But of this great many, which are the best luxury SUVs? We sat down, scoured our reviews, took some votes, had some discussions and came up with the luxury SUVs we view as the best. They are listed alphabetically within the six segments listed below.  Best Subcompact Luxury SUV   |   Best Compact Luxury SUV   |   Best Midsize Luxury SUV (Two-Row) Best Midsize Luxury SUV (Three-Row)   |   Best Flagship Luxury SUV (Two-Row)   |   Best Flagship Luxury SUV (Three-Row)  Best subcompact luxury SUVs Mercedes-Benz GLB-Class Why it stands out: Outstanding space and versatility; legit luxury interior; amusing GLB 35 versionCould be better: Overwhelming and confusing tech interface Most subcompact luxury SUVs are a dubious value, with cramped interiors of marginal quality and unrefined driving dynamics. You'd be much better off paying less money for a loaded, non-luxury compact SUV. The Mercedes GLB is different, though. Its boxy design provides space few other subcompact SUV can match (luxury or otherwise), while its cabin design and feature content are in keeping with pricier Mercedes models. The quality's not exactly up to GLC standards, nor is driving refinement, but the difference is appropriate for how much you're saving and still perfectly acceptable. There's nothing dubious about buying a GLB.     Volvo XC40 Why it stands out: More features for the money; spacious and versatile interior; distinctive design; electric versionCould be better: Fuel-efficient base engine only available with FWD Most subcompact luxury models feel a bit like cheap knockoffs of their bigger, pricier brand mates. The XC40, by contrast, is a break from the Volvo norm in a good way.