1991 Bmw M5 E34 Black 3.6 Liter 5 Speed 525 530 535 Hand Built 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.

BMW 3 Series Gran Turismo gets leaked well ahead of Geneva reveal

The great power of the internet has allowed us to get an early first look at the all-new BMW 3 Series Gran Turismo, a car that is slated to be shown in full at the Geneva Motor Show next month, albeit without many details to go on right now. With pictures leaking out this early in the game, we'd expect that you won't have to wait until March to get the full lowdown, however.
Our first look at the 3er GT reveals a car that is, to our eyes, a tidier piece of design work than its 5 Series GT brother. The long-backside proportions are still a bit ungainly, at least from these images, but they're helped tremendously with the larger wheel/tire package and more aggressive fascia of the sport package.
Expect the 3 Series GT to hit the ground running, with the same turbocharged 2.0-liter four-cylinder and 3.0-liter inline-six found in the standard 3 Series sedan. BMW's popular xDrive all-wheel-drive system is a virtual lock for the option sheet, too.

BMW 1 Series GT spied in 7-seat trim

As BMW prepares to introduce its first-ever front-wheel drive car, the upcoming 1 Series GT, it looks like there will be at least two versions of the car. A conventional-looking hatchback was spotted testing late last year, but now we see an extended-length version in order to accommodate a third row of seats.
Judging by these spy shots, this 1 Series GT prototype has received an extended wheelbase, larger rear doors and more upright D-pillars compared to our previous spy shots (show in the gallery below) all with the aim of creating additional passenger and cargo space. Like the smaller 1 Series GT, this longer model would likely carry over the same powertrain options, which are expected to consist of three- and four-cylinder engines, a hybrid system and the choice of front- or all-wheel drive. The 1 Series GT could make its debut this fall at the Frankfurt Motor Show, but we might have to wait until next year to see the people mover.