2000 M Roadster Rare Color Combo White Ext. Imola Red/black Int. Imola Red Top on 2040-cars

Auto blog

BMW details Concept X5 eDrive ahead of New York debut

Already weighing more than most other types of vehicles and with the space to accommodate the extra equipment, crossovers and SUVs arguably make for one of the more ideal platforms to transform into a hybrid. And there have been a handful of them - like the Audi Q5, Infiniti QX60/Nissan Pathfinder, Porsche Cayenne/Volkswagen Touareg, Lexus RX450h/Toyota Highlander and Cadillac Escalade/Chevy Tahoe/GMC Yukon - but by and large the majority of hybrids on the market are sedans and hatchbacks. BMW, however, looks poised to join the minority with the X5.
The Bavarian automaker showcased the X5 eDrive concept at Frankfurt last year, and as promised, has now revealed the followup it will present at the New York Auto Show in just a few days. The new Concept X5 eDrive, as BMW has now revealed, pairs a 2.0-liter turbo four good for 245 horsepower to a 95-hp electric motor to deliver a combined 340 horsepower. Its lithium-ion battery can power it for up to 20 miles and at speeds up to 75 miles per hour before the gasoline engine needs to kick in. All that without sacrificing the vehicle's utility, maintaining an almost perfectly flat loading floor with 40:20:40 split-folding rear seats, and without sacrificing much on performance, either: with a 0-62 time of seven seconds flat, the X5 eDrive concept is quicker off the line than the production X5 with the 2.5-liter turbodiesel and just a tenth off of the 3.0-liter turbodiesel.
With the full technical details now released (you can delve into it all in the press release below), the only question remains when BMW will actually put the X5 eDrive into production. Given its appearance in New York, though, we gather that whenever it does reach showrooms, it'll reach American ones as well.

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 M2 reportedly green-lit

A BMW M2 is on the way, according to a sub-forum in the Bimmerpost empire. Of course, we're actively enjoying a few grains of salt, just to be safe, as the post doesn't mention explicit sources, saying only that "multiple inside sources (who have been accurate in the past)," have confirmed the car.
Provided the forum is correct, though, there's some juicy information here. Production is allegedly slated for late fall 2015, with deliveries likely starting in early 2016. The new sports coupe should arrive with 365 to 375 horsepower, courtesy of an upgraded version of BMW's N55 turbocharged, 3.0-liter inline-six.
The report claims BMW also considered a modified version of the 2.0-liter, turbocharged four-cylinder found in the Mini Cooper S. That engine, known internally as the B48, would have been called the S48 for M2 duty, a significance that we're sure BMW purists would appreciate (the only BMW engine to wear an S designation was the four-cylinder from the legendary E30 M3).