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2021 BMW M3 and M4 vs all the high-powered sport sedans and coupes

Should you have a found a way to get past that schnoz, you've probably digested some of the basic specs for the all-new 2021 BMW M3 sedan and M4 coupe specs. They're plenty impressive. There's also, basically, two sets of them thanks to the regular and Competition versions that differ in engine output and transmission type.  But how do they compare to other ultra sport sedans and coupes? Well, we were wondering that too, so we fired up the Autoblog Comparison Spreadsheet Generator 5000 (aka me chained to my computer in a dark basement).  Sadly, there are surprisingly few competitors for the 2021 BMW M3. Rival sedans include the Mercedes-AMG C 63 and the Alfa Romeo Giulia Quadrifoglio, along with the Audi RS 5 Sportback sedan/coupe/hatchback thing. There's no more Lexus IS F, the Cadillac CT4 Blackwing has yet to arrive and Jaguar doesn't offer a spicy XE R.  Happily, there are more coupe rivals for the 2021 BMW M4, including the two-door versions of the AMG and Audi as well as the Lexus RC F. I also included the Ford Shelby GT350 and Chevrolet Camaro SS 1LE. On paper, they align incredibly well. On the street and on a track, I can personally attest that these Americans are fully capable of keeping up and/or bettering the fancy-pants luxury brands (and let's not forget there are even more powerful, hardcore versions available). If they don't align in terms of price or prestige, whatever. OK, let's get to the spreadsheet. Let's start with the coupes and note that I didn't bother listing the dimensions for the M4 Competition and C 63 S as they are identical to their "lesser" siblings.  I won't bother burning words explaining what you can see on the chart. Instead, I'll point out a few things that stood out to me. First, BMW M comes awfully close to matching the output of AMG's twin-turbo V8 despite having two fewer cylinders. Similarly, Audi manages to better the 0-60 time of the M4 Competition and tie the C 63 S despite being WAY down on power. It's not like it weighs less. Magic? Second, and speaking of 0-60 times, remember the importance that transmission and drivetrain make with them. It's not just horsepower and torque. An automatic will be quicker and easier to launch than a manual, while all-wheel drive provides more instantaneous and beneficial grip.

This map reveals the cleanest vehicles based on location

Naysayers love to point out how dirty the electricity grid mix is when it comes to charging electric vehicles. Curmudgeons are eager to jump into any conversation about EVs to enlighten the lucky listeners about how plug-in cars contribute to pollution, sometimes even throwing in a dash of climate-change denial for good measure. (Thanks, buddy. Pray, tell me more about the plight of oppressed SUV owners.) Unless someone buys an EV just because they think they're cool (which, yeah, they often are), they probably have at least a passable understanding of their environmental pros and cons. As many EV owners are already aware, location has a lot to do with any particular plug-in car's carbon footprint. Still, there's always more to know, and knowledge is not a bad thing, especially if one uses it to do the right thing. That's why this handy-dandy map from Carnegie Mellon University is so interesting. CMU researchers have compiled information about the lifecycle greenhouse gas emissions of various EVs based on where they're charged, as compared to gasoline-powered vehicles. The researchers looked at the Nissan Leaf, Chevrolet Volt, and Prius Plug-In Hybrid versus the gasoline-dependent Toyota Prius hybrid and the stop-start-equipped Mazda3 with i-ELOOP and compared grams of CO2 emitted per mile. CMU takes into account the grid mix, ambient temperature, and driving patterns. CMU takes into account the grid mix based on county, as well as ambient temperature and driving patterns in terms of miles traveled on the highway or in the city. For instance, if you drive a Nissan Leaf in urban areas of California, Texas, or Florida, your carbon footprint is lower than it would be if you were driving a standard Toyota Prius. However, if you charge your Leaf in the Midwest or the South, for the most part, you've got a larger carbon footprint than the Prius. If you live in the rural Midwest, you'd probably even be better off driving a Mazda3. Throughout the country, the Chevrolet Volt has a larger carbon footprint than the Toyota Prius, but a smaller one than the Mazda3 in a lot of urban counties in the US. The Prius and Prius Plug-In are relatively equal across the US. Having trouble keeping it straight? That's not surprising. The comparisons between plug-in and gasoline vehicles are much more nuanced than the loudest voices usually let on.

Did the Chevy Corvette Z06 break 7 minutes at the Ring? Not likely

"Just because it's on the internet doesn't make it true." That's rule number one, two and arguably, three, of surfing the world wide web. In today's example of this rule, we have the following. The website HorsepowerKings is claiming that a 2015 Chevrolet Corvette Z06, with the eight-speed automatic and Z07 package, managed to lap the Nurburgring Nordschleife in under seven minutes. To put that in perspective, that super-quick time would put the 650-horsepower, $97,000 (the price of a 2LZ with the Z07/8AT combo) Z06 a mere two seconds slower around the world's most challenging race track than the $929,000, 887-horsepower Porsche 918 Spyder Weissach. It's about eight seconds quicker than Nissan's own test of the GT-R Nismo Track Pack and 13 seconds faster than a Dodge Viper ACR. Unfortunately, Chevy says there isn't anything to it. We reached out to the Bowtie's Monte Doran, who confirmed that HK's claims are "not accurate." "Any one – a manufacturer, a journalist, a guy standing on the fence of the Ring – can claim a lap time. As such, we think the in-car video is essential to proving a time is real and credible, and Chevrolet will not release a lap until we have a video to substantiate the claim," Doran told Autoblog. "Chevrolet accumulated nearly 1,000 miles of testing on the Nurburgring with the Z06. During that time, we only had two opportunities to run a lap on video – and both were rained out. If we get a lap on video, we will post an official time." Doran finished by referencing the "only official lap time" for the Z06 – a 2:41 around the Virginia International Raceway. Frankly, we aren't terribly surprised by Chevy's position. One would imagine if the Z06 were matching million-dollar hypercars around the 'Ring, the company would literally be screaming about it from Renaissance Center's rooftop. As this is quite the opposite of that, though, we're betting that the real Z06 lap time - while still likely very, very fast – won't be quite quick enough to frighten the brightest and best of today's hypercars.