2003 Porsche Carrera 2 on 2040-cars

Auto blog

Volkswagen Group previews its wares on eve of Geneva show

The Volkswagen Group is comprised of 11 brands producing 240 vehicles across 49 factories throughout the world. So the best way to show off the range of the VW family is to cram a few thousand journalists and VIPs into a massive makeshift stand to outline the Group's goals, what's in the pipeline and what you'll be able to buy later this year.
To that end, VW pulled out all the stops on the eve of the 2012 Geneva Motor Show, bringing along 10 vehicles from across the range. We'll be delving into the details of each over the next two days of show coverage, but before that happens, you can read all about what we saw tonight from the cheap seats after the break.

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.

Porsche tipped to reveal purist's 911 R in Geneva

Update: The 911 R dam has broken well ahead of its official reveal at Geneva. Stay tuned for full coverage, but take a look at this image from Twitter user @PistonHeads and let us know what you think in the comments below. This content is hosted by a third party. To view it, please update your privacy preferences. Manage Settings. The original post continues below. With much of the 911 family going turbo, there's room in the lineup for a purist's Porsche: a naturally-aspirated, rear-drive, manual-only model that'll essentially be a stripped-down GT3. The latest reports indicate that this model, initially expected to be called the 911 GT but now more likely to get the 911 R moniker, will be unveiled in Geneva. It's also tipped to wear skinnier tires that will sacrifice grip for a more linear driving experience, and jettison the big wings in favor of a sleeker, more classic profile. What that all boils down to is a GT3 in its essence, and it will likely pack the non-turbo engine from either the GT3 or GT3 RS (pictured above) – or some version thereof. Recall that both the GT3 and the GT3 RS are PDK-only, although Porsche has decided that the next-generation GT3 should give customers the option of shifting for themselves. According to Motoring.com.au, which recently spoke to 911 product line manager August Achleitner, the purist's 911 will be unveiled at the Geneva Motor Show less than two months from now. "Come to Geneva and you'll find out," said Achleitner "but for now this is all I can talk about." Don't get your hopes up too much, because production is expected to be severely limited, with the entire production run likely to be pre-sold. Related Video: