Sdrive28i Bmw Z4 Sdr28i New 2 Dr Convertible Manual Gasoline 2.0l Dohc 16v 4-cyl on 2040-cars

Auto blog

M-fographic breaks down the history of BMW performance machinery

Few characters carry the kind of clout among performance enthusiasts as the letter M. For 35 years now, that one letter has adorned over 300,000 BMWs, each tuned to deliver a higher degree of performance than the stock models on which they're based.
The M division has worked up nearly 100 different models over the past third of a century, which can leave even the most expert among Bimmer fanatics bewildered. Fortunately British auto loan service Carfinance247 has commissioned this handy infographic to make sense of it all, and you can check it out below to see what the letter M really stands for.

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.

Mini Rocketman concept reportedly going into production as an EV

Remember the Mini Rocketman Concept from the 2011 Geneva Motor Show? If you don’t thatÂ’s OK, as itÂ’s been almost an entire decade since Mini pulled the wraps off. Despite the massive time lapse, Mini decided to revive the concept, not just for show. The companyÂ’s finally going to put the Rocketman into production, as an electric vehicle. We've heard this before, a few years ago, but nothing was set in stone. Now it seems a decision has been made. AutoCar in Britain recently learned that the Rocketman will fulfill its premise as the companyÂ’s first subcompact city car. The production model, scheduled for 2022, will reportedly be heavily reworked and built as a joint project with Chinese automaker Great Wall Motors. “WeÂ’re advancing plans for a model along the lines of the Rocketman. ItÂ’s a car we have been looking at for a long time, but to build it profitably at the price point we think customers are prepared to pay, you need a joint venture partner to share costs. Great Wall Motors has provided that opportunity with a shared electric car platform that will be used by Mini,” an anonymous “senior BMW official” was quoted as saying. The production Rocketman will retain its three-door hatchback design and is expected to serve as the manufacturerÂ’s newest entry-level model. It will be built by Great Wall Motors in Jiangsu, China, while BMW oversees the design and production with plans to sell it in all markets globally. When the Rocketman first surfaced at Geneva, it was essentially BMWÂ’s direct response to DaimlerÂ’s Smart ForFour. However, even with positive feedback from prospective customers, the project was shelved because development discussions between BMW and its initial partner, Peugeot, ended abruptly. The companies were reportedly going to share platforms and powertrains in another joint venture. In the new agreement with the Chinese company, the production model will apparently use a small-car platform used by Great Wall Motors called the Ora R1. The Peugeot-BMW project was going to use either a three-cylinder gas or diesel engine. But the new model will gain an all-electric powertrain by Spotlight Automotive as a part of BMWÂ’s massive plan to launch up to 25 new plug-in hybrid and all-electric vehicles by the end of 2023. One of those models is the newly released all-electric Cooper SE.