2016 Bmw X3 Xdrive28i on 2040-cars

Auto blog

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.

2015 BMW M4 gets initiated into the club

It's easy for enthusiasts and traditionalists to give BMW a hard time these days, what with its plans to add more front-wheel drive models and seeming move away from more emotionally connected cars. However, the push for perfection that underscored its old Ultimate Driving Machine motto is still in there, especially in its M models. In fact, the first M4 recently made it to US shores, and the company thought the only appropriate way to celebrate was to introduce its new coupe to some of its high-performance forefathers.
The M4's initiation into the M car brotherhood involved bringing together no fewer than 52 classic and newer models - including four racecars and many privately owned vehicles - to an empty parking lot and letting the coupe drift and slalom around them to say hello. According to BMW, there was a combined 11,566 horsepower on hand. It takes a pretty trusting owner to stand back and watch as a brand-new vehicle slides its tail out with the rear wheels smoking within feet of their pride and joy. Stay tuned until the end where the owners and their cars get a shout out in the credits. Scroll down to read BMW's press release about it.

2015 BMW X4 slides in on the diagonal starting at $45,625 in the US

If BMW has shown us anything, it's a knack for creating niches and expanding its product portfolio. Go back to the early '90s and it had essentially four models: the 3 Series, 5 Series, 6 Series and 7 Series. End of list. Since then, the Bavarian automaker has not only taken on Mini and Rolls-Royce, but has expanded its own range of models exponentially. You can chalk a big part of that up to crossovers, and another sizable chunk to giving existing models a different roofline and calling it something new. What we have here is a prime example of both.
Previewed in concept form the better part of a year ago at the Shanghai Motor Show, the slantback version of the X3 (and the baby brother to the X6) is now here in full production guise. Mechanically it's essentially the same as the new X3 on which it's based, but amps up the "sport" at the expense of the "utility" part of the SUV equation.
BMW will undoubtedly offer a wide range of powertrain configurations in markets around the world, but back in the United States it'll be offered in two specs: the X4 xDrive28i, packing a 2.0-liter inline-four with 240 horsepower and a $45,625 sticker price (including destination), or the X4 xDrive35i with the 300hp 3.0-liter six and a $48,925 MSRP. Either way, you're getting an eight-speed automatic and all-wheel drive.