1998 Bmw 540i Base Sedan 4-door 4.4l on 2040-cars

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Is the skill of rev matching being lost to computers?

If the ability to drive a vehicle equipped with a manual gearbox is becoming a lost art, then the skill of being able to match revs on downshifts is the stuff they would teach at the automotive equivalent of the Shaolin Temple. The usefulness of rev matching in street driving is limited most of the time – aside from sounding cool and impressing your friends. But out on a race track or the occasional fast, windy road, its benefits are abundantly clear. While in motion, the engine speed and wheel speed of a vehicle with a manual transmission are kept in sync when the clutch is engaged (i.e. when the clutch pedal is not being pressed down). However, when changing gear, that mechanical link is severed briefly, and the synchronization between the motor and wheels is broken. When upshifting during acceleration, this isn't much of an issue, as there's typically not a huge disparity between engine speed and wheel speed as a car accelerates. Rev-matching downshifts is the stuff they would teach at the automotive equivalent of the Shaolin Temple. But when slowing down and downshifting – as you might do when approaching a corner at a high rate of speed – that gap of time caused by the disengagement of the clutch from the engine causes the revs to drop. Without bringing up the revs somehow to help the engine speed match the wheel speed in the gear you're about to use, you'll typically get a sudden jolt when re-engaging the clutch as physics brings everything back into sync. That jolt can be a big problem when you're moving along swiftly, causing instability or even a loss of traction, particularly in rear-wheel-drive cars. So the point of rev matching is to blip the throttle simultaneously as you downshift gears in order to bring the engine speed to a closer match with the wheel speed before you re-engage the clutch in that lower gear, in turn providing a much smoother downshift. When braking is thrown in, you get heel-toe downshifting, which involves some dexterity to use all three pedals at the same time with just two feet – clutch in, slow the car while revving, clutch out. However, even if you're aware of heel-toe technique and the basic elements of how to perform a rev match, perfecting it to the point of making it useful can be difficult.

BMW mulling potential 9 Series production

Nine months may be long enough to bring another human being into the world, but it may take BMW a bit longer to make up its mind on the production of a potential 9 Series model. The idea was first mooted when the Bavarian automaker presented the Vision Future Luxury concept at the Beijing Motor Show last year. Billed (not unlike rival Audi's Prologue concept) more as a design study than a pre-production concept, the Vision Future Luxury show car nevertheless took a larger form than the 7 Series, prompting speculation that a new flagship sedan could be in the works. The better part of a year later, such a decision has reportedly yet to be taken, but over at BMW Blog they're reporting that the automaker's incoming chief executive Harald Kruger is a fan of the idea and could give it the green light after he takes the helm in May. If approved, the model likely to be dubbed 9 Series would reportedly compete with the Mercedes-Maybach S600 – but then that model was earmarked to take on the Rolls-Royce Ghost. BMW has typically been careful not to overlap with its Rolls-Royce division, but considering how it's also been going downmarket with front-drive models to close the gap to the Mini brand, we wouldn't be all that surprised to see the 9 Series positioned maybe just below the next-generation Ghost and developed alongside it, taking a page out of rival VW's playbook. Volkswagen has, after all, made a brisk business out of sharing platforms and slicing market segments between the various brands under its umbrella. And while BMW is nowhere near as large, its new leadership could find new ways to increase its market share.

Sunday Drive: A new Rambo Lambo takes center stage

Surprise! Autoblog readers love fast cars. Doesn't matter what shape; doesn't matter what size. As long as it's got big power, wicked acceleration, and ludicrous speed, you're interested. Take, for instance, the brand-new Lamborghini Urus. It's got a 4.0-liter twin-turbocharged V8 sending 641 horsepower and 627 pound-feet of torque through an 8-speed automatic transmission to all four wheels. It hits 62 miles per hour in 3.6 seconds, and has a top speed of 189.5 mph. Ludicrous speed? Check. And although you'd be hard pressed to draw a line straight back from the upcoming Urus to the old, off-road-ready LM002, at least you can say that Lamborghini does have a history of producing overpowered SUVs. A 5.2-liter V12 engine producing 444 horsepower and borrowed from the Countach certainly qualifies as big power, especially considering this was in the 1980s and '90s. A prime example just sold for nearly half a million bucks. Moving along to more traditional sportscars, we got a sneak peek at the next Porsche 911's interior, thanks to some intrepid spy photographers. And we spy with our little eyes some major changes to the quintessential German sportscar. Finally, we round out this Sunday Drive with two First Drive reports. Both are German, but past that, they couldn't be more different. Either way, ludicrous speed is all but guaranteed by either one. As always, stay tuned to Autoblog for all the latest automotive news that's fit to print. The 2019 Lamborghini Urus, fastest SUV in the world, has landed Rare U.S.-spec 1990 Lamborghini LM002 fetches $467,000 at auction Next Porsche 911 will get a major interior overhaul 2018 Mercedes-Benz S-Class Coupe/Cabriolet Review | Creamy goodness 2018 BMW M5 First Drive Review | Power meets traction