2007 Bmw 650i Base Convertible 2-door 4.8l on 2040-cars

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Watch Atieva's electric van outrun a BMW i8 and Dodge Viper

A little while back, automotive startup Atieva drag raced its electric van, called Edna, against a Tesla Model S and a Ferrari California in order to compare its performance against known and revered mechanical athletes. Again, the Silicon Valley-based company is putting its prototype up against electrified and conventionally powered performance vehicles on the drag strip. Last time around, Edna, the Mercedes-Benz Vito van equipped with a 900-horsepower, all-wheel-drive powertrain, bested both of its foes. In that showcase, Edna was hitting 60 mph in a little over three seconds. Comparatively, BMW lists the i8's 0-60 time at 4.2 seconds, though Road & Track clocked it at 3.8 seconds, with a quarter-mile time of 12.3 seconds. The Viper does 0-60 in 3.4 seconds. Before you even watch the video above, you can imagine how it will end, as the retuned Atieva Edna rips 0-60 mph in 2.94 seconds. Atieva clocked the quarter mile at 11.3 seconds at 117 mph. It's worth noting that driver skill can have a lot to do with a car's straight-line performance. We've witnessed Viper's elapsing the quarter mile in well under 12 seconds, which means it should be quicker in this test than the i8, if not the Edna. Still, the performance showcased in the video is exceptional. To improve Edna's stats, Atieva says it has used testing data to fine tune its AC induction motors at higher speeds once it got low-speed performance locked in. After testing in the hot California sun, including the race you see above, Atieva drove Edna 90 miles home with range to spare. As for production plans, Atieva will put this powertrain into a sedan slated for sale in 2018. In the meantime, the company will keep testing and tuning its working prototype, and has even invited the public to put their cars up against Edna in future sessions. Related Video: Related Gallery 2015 BMW i8 in Petoskey, MI News Source: Atieva, YouTube: Atieva via Electrek Green Motorsports BMW Dodge Automakers Electric Future Vehicles Videos drag race atieva

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 M boss denies supercar collaboration with McLaren

The first time there was a McLaren Honda Formula 1 team, McLaren did some moonlighting with BMW on a supercar for all time, the F1. It just so happens that McLaren Honda is a thing again, and Car magazine recently ran a piece saying McLaren and BMW would get back together on another hopped-up coupe with roughly the same working agreement as before: BMW supplies a screaming V8, McLaren builds the body to go around it. Only this time the car would be a BMW model, not a McLaren, and be BMW's version of the next-generation McLaren 650S. The Car piece said that BMW head of R&D Klaus Frolich first got in touch with McLaren nine months ago, however, the head of BMW's M division, Frank van Meel, said he doesn't know anything about it. Mentioning every BMW exec referred to in the story, van Meel told Australia's Motoring, "I haven't had a phone call, [CEO] Harald Kruger hasn't had a phone call, and Klaus Frohlich hasn't had a phone call." The Car story said the reason BMW hasn't done a conventionally powered exotic recently is that former CEO Norbert Reithofer didn't want anything to eclipse the i8, the i brand, and the eco credentials the brand is charged with promoting. Changes in the executive suite – new CEO, new M boss, new R&D chief – were thought to meant changes in approach. Not according to van Meel, who gave those same i brand reasons to Motoring as then reasons BMW has no interest in a 750-horsepower, quad-turbo coupe. On top of that, after spending billions to move the game forward with in-house carbon fiber technology, van Meel asked, "I don't understand why we would need to work with McLaren for a supercar anyway. All of the technologies the story suggested are technologies that are core competences here at BMW and at M. Nobody in the world is more advanced with carbon-fibre than we are." The extent of the denial is so detailed that we're inclined to believe BMW on this one; cover stories usually stop at curt phrases like "We have no knowledge of that" or "We don't comment on future product." So you can put away your dreams of a McLaren F1 Part Two. For now. Related Video: